I dont see why CZ doesnt actually makes a handgun into 10mm.
Because:
1. The optimal handgun caliber for defense is 9 Luger;
2. An attempt to make 10 Auto the standard LE caliber failed miserably;
3. No military seems interested in 10 Auto; and,
4. The 10 Auto is great for hunting and for wilderness defense against irritable or hungry megafauna. I don't think Czechia has any remaining megafauna, and the Czechs who hunt African megafauna wisely do so with rifles.
Doesn't CZ offer 10 Autos through Dan Wesson and Colt? If you insist on a 75-pattern 10 Auto, can't you find one from Tanfoglio?