Wish it was that easy to find it's only in 2 models of sleds for 2 years.Plenty of grave yards for that stuff.
Great Lakes Snowmobile (?) just east of Grand Rapids, Mich should be able to help you.
Al's Snowmobile back east too.
I'm sure there are oodles of them in Minniconsin too.
Prolly even Dennis Kirk.
Or even your local Doo dealer?