I looked at one of these, and I would not bother with the TIFFs. They're bad. Really bad, with a lot of color crossover that is impossible to fix. I'm a very good editor and the best I could do with it still looked awful. Here's my best result with the TIFF:
View attachment 323225
The JPEG was actually easier to edit. I got pretty good results with it:
View attachment 323224
If you want the full-size layered PSD files that I created, let me know and I'll put them on my server and PM a download link to you.