Emax

I believe you can purchase those.... if not, you can get them from eBay.

I do know you can still get a hold of the 3.5" sample floppies from the
company that did the Emax I sound library called, "Greytsounds".  Check
'em out on the net.  Do a search on Yahoo or such for their name.

Good Luck on your search, 

Jeff