I looked everywhere for 5.45X39 snap caps a few years ago, even called zoom. They told me that they did not make them and had no intention of doing so anytime soon.
At the time, there were a few people looking for them. One of the members here offered to make some dummy rounds. he just pressed new bullets into fired cartridges.
They were short money, IIRC I paid like $7-$8 for 5 of them. I wish I could remember who it was. Not too many people have reloading dies for that caliber.