Thanks bro. :bier:I am pretty sure the answer is affirmative to the second question because 14-round capacity magazines are readily available.
As to the first question, CZ USA should be able to answer for sure but it seems The Gunsource has it in two versions; one with the 10 round mag and the other one with the 14.
According to this, TheGunSource: CZ-USA 75 P-01 Pistol, 01199, Black Finish, Single/Dou
the 10-round version is #01199. I would still ask CZ, to be sure.