Galfer are the big names in wavy's IIRC but I hate the look if you're truly desperate and want an OEM one, I can ask my local bike shop who'll order it straight from Yamaha Japan ... but I don't think it'll be cheap - I seem to remember being quoted US$200 each for the TL ...
I wasted so much money and time trying to sort out the brakes without actually just manning up and paying for new discs