Put in a 2005 driveshaft today. I am not going to be waiting for that shaft to fail. Mine looks like it is a (good) one however. Too bad I bought $300 in Avid drivers before the failures started. I would take $750.00 from Polaris as a smooth over.
I am running a 166" track with all the windows cut. Good eye guys. Pretty sure any driveshaft from 2005 up will work. BTW, the weight difference is minimal. I bought it off eBay for $99.00 and it had very little wear. One caution, change the bearing on the clutch side to a rubber sealed bearing.