Mr. Knight might be able to give you some suggestion. There are a few well known photographers' websites which you could actually direct email to, I think you should try google them and contact them directly about this.
Photography and Filmmaking
Creative, conceptual and technical; contemporary and historicalive recieved some good advice from Kawai,such as going to schools and asking photo departments and to camera stores but no one knows anything. the first place i looked was online,of course,but still .
cant find a 20% grey 20'x17' backdrop.
I love this place and the people in it,so please help me out guys.
In reply to KaWai:
that would be IDEAl, I have sent him a question like that but about a high speed camera,but i never got a reply.Ill try again about the backdrop this time.if you get any other leads,holla at me,kawai
thanks
In reply to SAKIS:
You could walk into any photographer studio(commerical portrait photographers) and ask them where they buy their backdrops.
In reply to KaWai:
well it turns out camera exchange had one that was 9 feet wide,not nearly as big as i needed but good enough. first day shooting one of the models went and put a whole in it with her heels.
cheers