You could try looking for one of those soft dust covers. They're a very soft cotton material that shouldn't rub off any paint. Then just put your normal cover on over that one. You can find them in most any aftermarket catalogue like Denis Kirk or Hi-Performance.
I'm with Pman, my factory Polaris cover fits tight as a fiddle string and is hard to get on, but it doesn't flap at all.
BTW: Just got a flier from Princess Auto, not sure where they have locations in Canada, but starting Tuesday they have polyester sled covers for $18.88. It says they are water repellant and UV resistant for 109" to 114" sleds. Also says good for trailering but I wouldn't bet on it for only $18.88.
I am picking one up just to pack back in the bush for our overnite trip this January, can't take my good canvas Polaris cover, too bulky.
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