Link,
Have you checked out these guys? They carry factory and aftermarket.
I just bought a couple ProMag for my Beretta Cougar 8000 as they are out of stock on factory ($29.95), for $9.95 each! They work just fine, no problems yet at least. The spring doesn't seem to have the same tension as my factory mags do though, but feed well in spite.
Check this site for your CZ and Tarus, might have what you want! http://www.cdnninvestments.com/cz.html