Thanks for the vote of confidence.  Unfortunately, this sort of wallet damage really isn't something I've got the proper skills to help with. I've been meaning to dig more into the actual structure of the wallet.dat file and learn how to parse it, but I just haven't had time for that yet. You could try asking jackjack.  He's the guy who created and maintains pywallet.

I wouldn't give up hope yet.  It might still be possible to extract private keys from a significantly damaged wallet.dat file.

It might also be possible to extract a partial/damaged private key.  If there are only a handful of bits damaged or missing, a brute-force approach to repair/replace the damaged/missing parts might also be possible.