Re: 1988 skidoo
A used one is going to be tough to find. I think your best bet in Colorado (aside from forums or Craig's List) is going to be Mark's down in Sheridan. This guy is terrific - does motorcycles in the summer and snowmobiles in the winter....
Marks Motorcycle Repair
2331 W Hampden Ave 182
Sheridan, CO 80110-2082
He's a good guy and has a lot of parts on hand. He gets used sleds sometimes that he just parts out (he's told me seats, windshields, and hoods are first to go) - even if he doesn't have one, he may be able to refer you.