Mec-Gar makes a stainless-nickle one-piece mag for the 75. My friend Dan has a 75b, and those are all he uses. He bought me one for my 45, and I am hooked! Very smooth, very clean, perfect spring pressure.
Camy just got a new 75b in 40, and we are going to fill her mag pouches with the Mec-Gar nickles. Dan has had his for many, many years, and has never once had an issue with them.
Will nickle not solve your dilemma?
ETA: They are not on the web site. But I know for a FACT they are in the catalog. I'll call Dan and get a catalog number, and post the numbers and description here so you can pick which you want and order direct with the part number.
Stand by for part numbers and descriptions.
EDIT
I was wrong, he has them for his Ruger, and we just got off the phone with Mec-Gar. They do NOT make a stainless or a nickle for the CZ, only blued in 10 and 16 capacities. Damn, I really screwed the pooch on that one. Dan uses the Mec-Gar for his CZ, but they are all blued.
Sorry guys! I could have sworn they made them. Oh well, can't be right all the time.
I'll call around and do some checking for you. The 2006 catalog has an all-stainless CZ75, so you'd figures someone would make a matching mag. But the mags that come with the all-stainless are blued, too, which is cheesy if you ask me.
Hopefully I can dig something up for you.