I would highly recommend Janita Cooper-Larkin. High quality, terrific turnaround time, wonderful people to work with and extremely competitive. She has done my demo tape, two 6 audiocassette programs and two video 3 cassette programs for me. If you go out of town, the freight will kill you plus the convenience is worth going local. You probably don't need more than 50.
Bureaus love it.
Easy to duplicate. Inexpensive to send. Menu-driven so you can bounce around where video is linear. Email if you are interested and I can forward source. I use On-Video in Carrollton, TX for all of my duplication needs.