Thanks to mancat I was able to get the measurements on his mags. Based on his measurements the Promag .223 AK mag should fit it, and the Polish Beryl. Promags are readily available, Polish Beryl mags are harder to find, but that may change with the release of the Polish Archer AK.
Special thanks to CaptainHero. He sent me a Bulgarian Circle 10 mag body for testing. I can say the Circle 10 mags work like they are made for the Vepr. I did have to take 3/10's of an inch og the magazine release to get the mag catch to allow the mag to lock in.
I'm posting info as it becomes available. I plan on doing a full write up on everything I've done when I get my final configuration worked out.