Tracking down media that has already expired

I am looking for some ideas on how to track down a recently expired tape.

I have a user who is looking for data that is about 70 days old. Our retention period for this particular server is 60 days, so my current catalog is of no help, and there is nothing lingering in any logs. How can a get a look into any old catalogs, without restoreing the whole catalog? My guess is that I could restore the catalog to a separate server, perhaps?

Thanks