I'm only going by memory (which is really risky), but I believe the SBH and Single Six use the same hammer. It's been about 5 years now, but I bought a new hammer for my SS from Ruger for $27 plus shipping.
The Single-Six & the Super Blackhawks do not use the same hammer.
As for finding some that are for sale, be prepared to pay for them. They are a desirable part in short supply, most of the time.
If some one "needs" one, yes. I recall almost 5 years ago or longer even, a dealer advertised in the Gun list for any and all Super BH ( old model) hammers and he was paying $100 each back then................