Well, I tried 2 photo shops, and in both of them the people had no clue what I was talking about. They carry tripods and all that stuff, but that's not gonna work. I guess I'll have to go to the 'better' photo store.
You can also get the 1/4"-20 screw from B&H when they re-open. I've used that one, it's easy to tighten and loosen with a quarter if you don't have a big flathead handy. It's also a little lower profile than the nobby plastic ones, if you care about that. peace lew