Check out this topic:

https://bitcointalk.org/index.php?topic=25091.0

It is a program that looks for bitcoin private keys on a computer disk.  I never needed it but tried it because it looked useful.  it worked back in 2013 with my wallet.  I deleted a wallet and put it to work on my disk.  It found all the keys and made a new wallet.dat file from them.

If you can't find the code I put my copy here:  http://gravina.x10host.com/thing/wallet-recover-0.3-linux.tar.gz

Give it a try.

If you do recover some old populated bitcoin addresses they may also contain Bitcoin Cash, Bitcoin Gold and Clams.