Greg...You might try these folks.
http://www.jackfirstgun.com/. Sorry, I could not get the url function to work to provide you a direct link.
I have had good luck finding assorted screws for various old firearms from them. I have a big advantage though, they are in my hometown and I can take an example down and the ladies behind the counter are very helpful and digging through bins until they find something that works.
If a phone call doesn't do you any good I would be happy to take an example down to them to try to match if you want to send it to me.
Well. I'll be...it did work. Hmmmm.
