I had some diamond cut wheels repaired on another car I had before the Supra, as someone said above, I would recommend doing your research on the company to ensure they have a lathe machine for proper diamond cutting, and make 100% sure they re-apply a new lacquer and heat treat it on the spot. Here in UK most of them are fully mobile, a good one will cost a bit more than $100 though, still cheaper than replacing and less hassle and results I'd say are 90-95% perfect, you'd only ever notice if you were a few inches from the rim which only you will be when washing it.