Have you heard something on Desert Island Jazz that is rare, out-of-print, hard-to-find, or is otherwise made of "Unobtainium"?
Here are a few links to record/CD sources that may be helpful, in no particular order or preference:

   





The Music Resource (a.k.a. Jamey Aebersold's Doubletime Jazz)

Jazsound

Oldies.com 

Mack Avenue Records