The 14 round mags were standard with compacts until recently.
CZ has begun shipping some mags that are dual 9mm / .40 with capacities of 15 / 11, respectively.
Mecgar (who makes mags for CZ) also offer their own magazines for the compact in the new dual caliber 15 / 11 capacity. The baseplates appear to be slightly different too, from pictures -- I haven't had access to the newer mags yet, so no direct experience.