It may sound terrible to suggest,but if you really only want a few Pmags get them off ebay for around 40$ a piece. Pmags aren't rare by any means,just thousands of people who don't even know what they are for are buying them in bulk to resell for a profit. Some list them as a "rebuild kit" to get around ebay policys. It's pretty easy to read between the lines.
sent from my ATARI sc1224