In a drawer in my grandmother's house in Pennsyvania, was a fancy little cardbord box that held a single .32/20 jacketed bullet round, a magazine for some undetermined round longer than a .22 (but not the .32/20), and a number of .22 Auto rounds. I have no idea where all this came from as the only guns in that house were a J.C. Higgins 16ga bolt action shotgun and a Remington 513 (I think) with no bolt or magazine.
The .22 Auto rounds facinated me as a boy.
Old Western Scrounger might have some .22 Auto rounds, but I bet they'd come pretty dear.
Aguila still loads 22 Auto:
http://www.cheaperthandirt.com/product/7-AMS22WAPretty impressive since the sole justification for the 22 Auto went out the window when black powder 22LR loads went out of fashion.
No such luck for 25 Stevens.
