Polaris web site states your clutch #1321880 was used in 800's from 2000 to 2005 also in 600 & 700's from 2003 to 2005. Used is cheaper but many are junk. Would not by used unless I could inspect first.
shouldn't be to hard to find a clutch for that thing. any p85 will work. LOTS out there...im sure someone has a decent used one they'll sell ya cheap.
Or another option is to put little shims on the side of the weight thats rubbing into the spider. Ive done this many times and gives ya some more life outa your clutch..
I use ones that come out of an older Arctic Cat M-cat.