Why don't you check with Microtools? They may have some rivets in they're misc. hardware. I had at one time, a catalog from a business in Fl. that had a large variety of small hardware I believe they were "The Small Parts Co" or something similar.
Another possibility would be a clock repair shop. I know they're hard to find but they may be able to help you along.
What about straight pins? if the diameter is close enough it would already have a head on it.
Yep, Montgomery kind of wraps around tthe soutthwest corner of Aurora. Downtown consists of two restaurants, the VFW, beauty shop & chiropractor