Bro sorry to say it but you might never get them back unlesss you find out who did this!
Sorry for your buddies loss. This is becoming a common occurance!

Also keep an eye on this forum:
http://www.florida street scene.com (delete the spaces)

Alot of GSR integras stolen within the last month and alot of shit goes up for sale on there! I see S2k seats all the time but no one knows where they came from