As for surplus rounds Classic Arms has 7.62x25 starting out at 100 rounds for 19.99 and they are reloadable. I'm just getting into reloading but before I spend the money for the eqiupment I'm reading ABC of Reloading.
To do a 9mm conversion on my Tok I will need to drill a hole through my frame for the pin to hold the spacer so I can use the smaller 9mm magazine, a 9mm barrel from a Norico 213 with linkage and a barrel bushing. What really sucks it that all of that cost as much as I paid for the Tok.