Just saw your post over in polaris forum and commented there, I have 8 tooth 2.86 pitch drivers off a 2015 Pro with about 500 miles on it, no idea what the stock drivers are worth and was thinking of keeping them in case I decide I don't like the 7 tooth on my Pro, but I would let them go for $100 plus shipping. Just had dealership press them off last Friday.
EDIT: Looks like someone offered you a cheaper source over in the polaris forum so I'll keep mine LOL...