I recently ordered a set of Hybrid Racing rearset relocators and I am quite impressed with the quality and adjustability. The plates are CNC machined and offer up to 9 different positions. I now have optimal adjustment of on track comfort and ground clearance.
You just bolt up your stock rearsets to the relocators then bolt them to the frame. At $120 CAD, it is wayyy cheaper than buying 500+ dollar rearsets that could break on the next crash! These were made to take the impact and save your frame tabs from expensive repair.