prolly all the game stores and cd stores in the mall. it also is called a skip doctor. after around 40 times using it the the wheel that repairs the discs needs to be replaced, it costs 12.99. i got the replacement kit at a sam goody.
Proven tool to repair the primary disc-related causes of screen freezing, booting problems, skipping and distortion in music, movie, game, and data discs
Patented radial polishing process does what wiping can't
Easy to use
Fixes CDs and DVDs
Also fixes Playstation1, Playstation2, XBox, Nintendo, and other CD-style games