Got a good FFL around that will do transfers? Gunbroker is a good place. These can be had for pretty cheap.
Thing is though find a CZ-52 armory kit with New barrels in it or buy a couple as these things eat their barrels pretty fast if you shoot it a lot. Firing basically a Submachine gun round out of a pistol wears them. I've had mine about 10 years now and have had to replace out the barrel once... (good 500+ rds out of one barrel and it was getting close to becoming a smoothbore) These are great fun though and pack one hell of a punch..
This and an old TT-33 I have are my CCW carry guns of choice.. They are really slim in Build rather compact and very reliable...