The cheapest seats I've found were on ebay, $85, almost exact oem with rails. On my 743 I bought a chunk of weatherstripping from the dealer for $20, a piece of 1/8 plexiglass from the hardware store, traced it, cut it and installed. Came out great and keeps snow from going down your back.I just put new upper and rear glass in my machine, picked up the parts from the dealer. They were not as expensive as I expected.