Hello,
You can still find some carts around, & a few mail-order places offer them. I have one for my CZ-101, but I'm not sure how many of the CZ line it works in. I have a friend with a CZ-1 I'll try it in, & if it works & you're interested, I could load it with some patches & sell it to you. I also have loads of patch sheets.
Take care
Mark