I did the roller conversion on my 95 Wildcat. You buy the 1st generation roller cover from the 96 440 sno pro. This is just the blank cover for $40. You buy the current plastic rollers for the new cover (3) and thrust washers (3) and use 1/4" hardened dowel pins for roller shafts. The dowels are held in place with (3) 10-32 flat head screws.
This bolts on the long tower secondaries and will use all the standard helix. If you want even lower friction, use the new Rock Rollers or hard rollers from HPE instead of the white UHMW rollers.