Hi Guys,
Just in case you are looking...I finally found a terrific site to get period correct case screws for your old bikes. It's called Rimfire CycleScrews. He sells kits specific to the engine you are working on in Mild Steel or Stainless. Not sure what Mild Steel means. (Hopefully zinc)
I just sent him an email to inquire. If I do not hear back by Monday, I will call him.
Here's the link. http://www.rimfire-eng.com/
Case Screws
grubsie and ByThe Lake: I purchased the mild steel from rimfire and wish I had the stainless instead. Mine dull out pretty quick. Stainless (I bought stainless for the starter covers elsewhere...not included in the rimfire kit) is easy to polish out with a tiny polish pad on a dremmel; not so with mild steel. Maybe I'm just overkill?? Also the rimfire kits' shank is threaded full length, not half like my (I think) originals. No biggie. Just my thoughts.