The best remedy for scratched discs I have discovered, is to rip the disc to your computer (PC DVD-ROM drives, from my experience, seem to handle scratches better than regular DVD players and usually have no problem copying an entire disc that a regular DVD player might have a hard time with.) and burn it to a blank DVD-/+R. I've been using this method since the I got my first CD burner with regular old music CDs. I usually just toss the recorded DVD into a white sleeve and tuck it in behind the DVD's booklet/chapter listing sheet. Of course, that is far less than ideal.

Have you perhaps tried contacting the actual manufacturer of the product to compain about their retail packaging failing to protect the discs and resulting in damaging your product? There is a chance they'll offer to send you a replacement disc, especially if it is happening in large numbers and they are recieveing numerous complants.

When Halo 3 came out the fancy special edition packaging proved faulty and allowed the discs to come dislodged during shipping resulting in many discs scratched beyond use, so the manufacturer set up a replacement program. It is worth at least trying to zip them an email. You have nothing to lose at any rate.