Well, there are programs that do it, but there going to be cost prohibitive. In the msuic industry this is done at the mastering houses. Two of the software platforms that I'm familiar with are SADiE (this one uses the Cedar Audio DeNoise Plugin) and Sonic Solutions (which has their own noise removal options built in). Unfortunately, both of these cost over $10k. And just having the software would be useless as they both run on propriatary DSP chips. All this to say that you're going to have a hard time finding a way to do this well.
However, under the Home Recording Act of 1998, you do have thr legal right to make a backup of all material that you legally own for your own personal usage (ie not selling, loaning out, etc.) I don't see any legal problem with making this backup from someone else's legal copy. So if you can find someone with a remastered version on CD, that might solve your problem.
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mmmm.... pudding
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