I've found a source in Germany that has brass rivets with 0.3mm heads on 0.2mm shanks; that's .012" heads on .008 shanks, but that means you need to deal with a #90 drill or thereabouts. They will fall straight through a hole drilled with a #80 drill. You don't want to ask the price :-(
Dennis:
I'll bite - what's the price and where can they be had? How about the other brass rivets you mentioned (or are these one and the same)?
