I have been looking for these and finally have found a source. They are more expensive, but are what police and race car drivers use in order to stop the warping which is all too common in Volvo's and other Euro cars.

If interested contact Rick at www.importpartsspec.com
There is nothing in this for me so do not consider it an ad. Am looking forward to giving these a whirl. Imagine he can have any rotor done for any car.

dick