Hi David! I created a resources page for you :)

All Background / Extras Casting Agencies & Background / Extras Casting Directors:
https://www.productionbest.com/casting-talent-services/background-extras-casting-agencies-background-extras-casting-directors

New York Casting Agencies & Casting Directors:
​https://www.productionbest.com/casting-talent-services/new-york-casting-agencies-casting-directors​​​

Digital / Online Casting Websites:
​https://www.productionbest.com/casting-talent-services/digital-casting-websites​​​

Miami Background Casting Agencies & Casting Directors:
Ed Arenas Casting:
​https://www.productionbest.com/casting-talent-services/ed-arenas-casting​​​

George Ortiz Casting:
https://www.productionbest.com/casting-talent-services/george-ortiz-casting

Castingland | Matias Duchoony Casting:
https://www.productionbest.com/casting-talent-services/castingland

Universal Casting:
https://www.productionbest.com/casting-talent-services/universal-casting

New York Casting Agencies & Casting Directors Ratings:
Melissa Braun | Casting Goddess:
https://www.productionbest.com/casting-talent-services/melissa-braun-casting-goddess

Grant Wilfley Casting:
https://www.productionbest.com/casting-talent-services/grant-wilfley-casting

Grant Wilfley:
https://www.productionbest.com/casting-talent-services/grant-wilfley

Melissa Braun:
https://www.productionbest.com/casting-talent-services/melissa-braun

Allison Hall:
https://www.productionbest.com/casting-talent-services/allison-hall

Waldron Casting:
https://www.productionbest.com/casting-talent-services/waldron-casting

David Waldron:
https://www.productionbest.com/casting-talent-services/david-waldron

Tony Behringer:
https://www.productionbest.com/casting-talent-services/tony-behringer

Stephanie DeCourcey:
https://www.productionbest.com/casting-talent-services/stephanie-decourcey

Roman Candle Casting:
https://www.productionbest.com/casting-talent-services/roman-candle-casting

Lucy Pho:
https://www.productionbest.com/casting-talent-services/lucy-pho

Todd Feldman:
https://www.productionbest.com/casting-talent-services/todd-feldman

Everyset Casting:
https://www.productionbest.com/casting-talent-services/everyset-casting

Hunter Lydon:
https://www.productionbest.com/casting-talent-services/hunter-lydon

RWS Global:
https://www.productionbest.com/casting-talent-services/rws-global

Background Inc.:
https://www.productionbest.com/casting-talent-services/background-inc

Jennifer Feraday:
https://www.productionbest.com/casting-talent-services/jennifer-feraday

Comer Casting:
https://www.productionbest.com/casting-talent-services/comer-casting

Wulf Casting:
https://www.productionbest.com/casting-talent-services/wulf-casting

April Custodio:
https://www.productionbest.com/casting-talent-services/april-custodio

Sarah-May Levy:
https://www.productionbest.com/casting-talent-services/sarah-may-levy

Extra Extra Casting:
https://www.productionbest.com/casting-talent-services/extra-extra-casting

HBG Casting:
https://www.productionbest.com/casting-talent-services/hbg-casting

Hilary Greer:
https://www.productionbest.com/casting-talent-services/hilary-greer

Amerifilm Casting:
https://www.productionbest.com/casting-talent-services/amerifilm-casting

Jennifer Sabel:
https://www.productionbest.com/casting-talent-services/jennifer-sabel

Rita Powers Casting Group:
https://www.productionbest.com/casting-talent-services/rita-powers-casting-group

Nikita Dolese:
https://www.productionbest.com/casting-talent-services/nikita-dolese

Jackie Snyder Benz:
https://www.productionbest.com/casting-talent-services/jackie-snyder-benz

Weist-Barron-Ryan Acting Classes & Casting Agency:
https://www.productionbest.com/casting-talent-services/weist-barron-ryan-acting-classes-casting-agency

Shadow Casting & Productions:
https://www.productionbest.com/casting-talent-services/shadow-casting-productions

Cast Partner:
https://www.productionbest.com/casting-talent-services/cast-partner

Kipperman Casting:
https://www.productionbest.com/casting-talent-services/kipperman-casting

Hudson Valley Casting:
https://www.productionbest.com/casting-talent-services/hudson-valley-casting

Impossible Casting:
https://www.productionbest.com/casting-talent-services/impossible-casting

Casting Double:
https://www.productionbest.com/casting-talent-services/casting-double

Salome Oggenfuss:
​https://www.productionbest.com/casting-talent-services/salome-oggenfuss​​​