How good are you at sewing... It might be possible to remove the area of leather that's torn, seat or seat back, undoing the stitching and replacing the part that's torn. That's a pain though and if your leather's dry you could cause more problems than you solve. Another alternative would be to take your car to a leather shop, but I'm guessing that it'll be $150-$200 depending on how much they'll have to replace. Check out Shoclub.com classified and Ebay to see if you can find a replacement seat for around $100. Finally, you can go out and look at seat covers, too. It won't solve anything, but it's cheap, easy, and it hides your little... secret.