got the part...used.
seems the 98 trailboss has the same rear break caliper as the 96 sportsman 400
I put the 2 parts next to one another and sure enough...same.
60$ bought it. Bonus...pads were still good!
I'll bring it to my mechanic monday so he can go to work.
shouldn't there be a chatrt somewhere displaying "equivalent parts" like that. That would make shopping around for used parts much more ...fruitfull.