Many speed loaders for AKM/AK47, but VZ-58 has fewer aftermarket accessories.
Found one!
http://ar-akmagloader.mysimplestore..../pz-2008-pz-58
This one works with loose rounds. AND...it will load your AK magazines, too!
While this one works with rounds on stripper clips.
https://www.youtube.com/watch?v=iQFCNOCzmT4