Why not use Bandcamp to sell the "remastered" catalog at a decent price? You upload 24/96khz files, PDF artwork, buyer gets to choose his favorite format (mp3 320, flac, etc) and you, the ZFT, get at least 85% of the revenue. Better control for you, easy to manage, and you can even add merch into it.
With a decent marketing campaign this could've been huge for you AND the fans.
You better check their recent policies. They do take a cut, as well as Paypal so in the end around 15-17% is taken i think. Which is better than iTunes which grabs 30% right off, without giving a lot of options to both user and content provider.