Welcome Bill, I'll be honest and say I don't know how many members on here actually return once their bikes are finished. Over the past couple of years I've been lurking here there have been some astounding builds, IED, Stidds, to name but a couple, but once their bikes are on the road, or sold to make way for new projects we don't seem to hear from them again.
You might want to check out
[You must be registered and logged in to see this link.] I know it's some distance from you, but I'm sure a lot of Brummie bikers make the trek down to the Ace, so posting something on their e-mal board might get you a good response, and who knows, if you tell them what you are looking for they might even ask you down for a day (or night's) filming.
I know it's been done before but a documentary on the Ace would be an excellent way to get the full cafe racer scene from it's origins onwards if that's what you're looking for.
I wish you luck with your project.