I sent you a DM about purchasing pretty much a whole set. I would also like to know how you removed the rivets on the wave 1 prime masters so I can do the same and order those 3 as well.
I put a thin blade behind the plate and just pried up a little at a time until I got it far enough out it could be held onto by a pair of mini pliers.
Are you still working on this project? I'd like to get a few Matrix handles if you are still making/selling them.