The biggest the older Skorpions get to is 9mmMak, IIRC. But the little squirt gun wasn't designed for a bigger caliber. Cute little sucker, isn't it?
The Czechs also developed the SA 23-26 series after WW2 off which the Israelis developed the Uzi. It was chambered in 9mm Luger then the 7.62?25mm Tokarev once the Soviets insisted, and this preceded the vz61 Scorpion.
http://en.wikipedia.org/wiki/Sa_vz._23(Bear in mind this was used in conjunction with vz52 rifle and its 7.62x45 cartridge. And this also was preceded by the VZ38 [think a Suomi in looks] and that was chambered in .380 ACP. In between the VZ38 and SA23-26, the CZ 247 was developed largely by revising the VZ38 but in 9mm Luger exclusively though this was never adopted by the Czechs -- many were exported to Africa and Central/South America [likely a weapon for Soviet allies in various proxy wars]).
It looks like once the VZ58 was developed (and straddling/able to better fulfill both assault/battle rifle and submachine gun roles -- the VZ58 replaced the VZ52 which was more of a traditional full size battle/service rifle) is roughly when the vz61 Scorpion in the smaller 32 ACP cartridge came about, and 32ACP seems to have matched the cartridge used by the state police and internal security forces sidearms/cz pistols of the era... Once 9mm Makarov was mandated as standard issue for the soviets (and presumably replace state police/security sidearms then too), the Scorpion was developed and offered in 9mm Makarov as well...
According to wikipedia, there is/was a 9mm luger version of the vz61 that was developed for the civilian market in the 90s...
Czech small arms has 9mm Makarov, .380 ACP and .32 ACP on their site. Looks like Czechpoint stocks all 3 as well.
