Maybe I'm late on this one, and just don't remember it, but this place has a few interesting AK products.
Non reciprocating gas tube based charging handle that can lock the bolt back. An interesting magazine release that you operate with your right thumb from the grip (for right handed shooters). Also, a long armed selector/safety lever designed to be operated with your wrist when you put your hand on the grip. Totally different than Red Star's small "shelf" that you operate with your forefinger. Definitely some interesting upgrades. Gave me some ideas on what to do with my own. I didn't look for pricing.