I managed to find someone that sold those in 100 count bags with the caps, so yay for that! I found the listing on Ohio Travel bag, but there was some uncertainty to what I saw. Either way, I have some to compare to... :-)
Does anyone have a suggestion on a set of dies for these? It looks like the dies that would be best are the ones for the Jiffy caps, but those are a bit domed and I'd prefer not to dome my nice flat rivets. I figure that my arbor press would be just fine, but that seems extreme for what we're doing.