GSX-R rearsets work well on a lot of older bikes, they're just so universal and easy to adapt. I've got Ninja 500R rear sets on mine, but I cut the passenger tabs off and welded new tabs in their place, then just drilled the holes in those and mounted. Even disc brake design rear sets can be used for drum rears with very little, if any modification. Look to local junkyards and ebay/craigslist to find someone parting out a bike, or just selling their old ones. Deals can be had.