I've read and heard for years that 7.63x25 Mauser can be fired in 7.62x25 Tokarev weapons, but haven't actually done this myself.
Here's a link for what it's worth.
http://en.wikipedia.org/wiki/7.63x25_Mauser
I looked into this when the CZ 52 pistols arrived and the 7.62x25 Tok was hard to find in non-corrosive ammo. You might try the 7.63x25 Mauser ammo in a Tokarev or CZ 52 pistol. I don't know if the 7.63x25 Mauser ammo is hot enough to reliably cycle the CZ 52 action. Don't know about converting a more modern pistol to 7.63x25 Mauser.
Still have a CZ 52 pistol and 7.62x25 Tok and 7.63x25 Mauser ammo around here somewhere, but it's on zombie reserve status.