Here is my reply to someone's quest for UZI mags from a couple of months ago:
A buddy of mine has some at his gun shop. Or:
What a country, Inc.
They offer four 25 rnd IMI mags and a pouch for $59.95
Enterprise arms has new ones by ProMag for $19.99
Sarco has used Isreali mags for $18.00
As to AK (mak 90) mags, they are available about everywhere military type rifles are sold.
The HK91 mags should be availble from SARCO (about 20 bucks)
The BHP mags are readily avaible.. try Forrest,Inc. at 1-619-561-5800