Try http://tantal.kalishnikov.guns.ru/ and www.kalinkaoptics.com
Both of these are sources of red dot sights and magnified scopes for AK's. Most of the Russian sights come with a built in mount. These mounts are nice in that they are quick detach and retain zero, but be aware that most of them are offset to the left, not centered over the bore, and some are very tall as well.
If you want a red dot for an AK that is centered over the bore and fairly low, go with the gen III Kobra. I have one and like it alot. If you want a magnified scope that is centered and low go with a BP-O2 low mount from tantal and put your choice of rings and scope on it.
www.swfa.com and www.samplelist.com are good sources for western optics at a good price (for mounting on that BP-02 low mount).