You've been told right! Mec-Gar is an Israeli company. Their pistol magazines are among the very finest I've ever used in my entire (long) life. Here's a quote from Midway's website:
Mec-Gar Mag CZ 75B 9mm Luger 16-Round Steel Blue
Mec-Gar magazine quality is so well known that firearm manufacturers including Browning, Remington, Sig Sauer and Walther have Mec-Gar build magazines under their brand names. These are high-quality, reliable steel magazines at an affordable price. Also fits the CZ-85. This magazine will not fit pre-B CZ 75 or 85 pistols. B suffix was added in 1998. Non-suffix early CZs did not have a firing pin block safety, reversible magazine release or ambidextrous safety.
I don't know exactly what CZ pistol you have. Suggest you phone Midway Tech Support and ask them for help. You might, also, want to visit Mec-Gar's website before you place an order. They have quite a selection of high quality magazines for CZ-75(B/BD) series pistols.
(I remember paying really big bucks to purchase 4 Mec-Gar, 'Hi-Caps' for my Browning P-35's while the, 'assault weapons ban' was in effect. The only thing that eased the pain in my wallet is the fact that these Mec-Gar's are really beautifully made magazines. What a law! It did absolutely no good for anybody except, perhaps, a few magazine sellers who just kept, 'raking in the mullah'!)