Just to bring this back up on the radar. I started to read this post and jumped on the first thing I read - ordered the "wrong" rivets which was very easy to do since Aircraft Spruce has lots of them in stock and you can buy them in quantities of one. I should have read the majority / multiple folks said get the 3214 rivets and the company "Genuine Aircraft Hardware" even chimed in as a source for the harder to find rivets (at a very fair price)
So, bottom line: go to the above source and order 3214-4-04 Cherrymax rivets and save yourself a lot of trouble and pain trying to get those an rivets set.
Kudos to you folks who can bend that way and set normal rivets!
Now I gotta go try to knock out some 3212s.