(eug) Gene,
I guess you mean Mengli Giray I, khan of Crimea in 1467, 1469—1475 and 1478—1515 - but at that time Crimea wasn't really a part of Golden Horde, in contrary it was in a state of war with it.
As far as I know, there is no any decent catalog of the coin from that period and that territory, and we still have to wait for somebody to put all those 6000+ coins in one place... You can try some Russian numismatic forums, you might be pleasantly surprised with the volume and quality of information there.
Eugene