How do you fix an ''out of print'' scratched CD ?

Go to best buy or similar and buy a disc cleaning/scratch removing kit. They help.
Otherwise, very fine polishing compounds like jewelers rouge (I thinks that's how to spell rouge?). Very fine polishing compound for cars will work great too. Keep in mind to rub from the center hole to the edge only-no circular motion and don't clean like you would a record by spinning it.

Try Secondspin.com,great selection of used cd's.

LAT International C Diamond has cured this on some discs. About $12 and if it doesn't cure it you can use it for its original use of enhancing reproduction by stopping laser scatter.

Buy another copy. There are several on ebay right now.

Check out the link below for a company that makes several plastic polishes and a cleaner.

http://www.noscratch.com/novus/index.shtml

I used this product to remove some scratches on my car's lexan headlight covers. It works great and I'll bet it will do the job on a CD.