Tom - I have seen some of the original issue CZ-52 magazines on gunbroker.com.
GunBroker.com Search Results: cz-52 magazine
Lots of extra CZ-52 parts, barrels, etc there today, but no spare magazines...
Usually they are paired up with a holster as a package deal.... I got quite a few of mine extra original magazines before Ebay banned the sales of magazines or firearms parts in October 2007.
The Sportsman's guide sells aftermarket CZ-52 magazines at less than $20.00 each.
Amt Back-Up .380 Acp 5-Rd. Blue Mag, Magazines & Clips, After-Market Mags, Magazine Shooting Ammo Load Blued at Sportsman's Guide
WX2-80352 CZ-52 7.62 x 25 8-rd. Blue Mag
$19.97
Club Price $17.97
I never have had an aftermarket magazine from them (for any of my semi-auto pistols) fail or jam yet!! The only CZ-52 magazine failure out of the pile that I have for my several CZ-52 pistols, has been an original issue magazine. It needs a new magazine spring/ failure to push up the rounds, or just a failure to feed!!!
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Carrying Military Surplus CCW weapons in California, for over a decade now!!