Since the PMAGs are sold out, I would like to offer an alternate I found that seems to be in stock. The Troy Battlemag 3 packs are listed as ships immediately. I can not verify if they are actually in stock (could be a Botach thing). If you're interested in trying, then here is the link:
https://www.cobratactical.com/Magazines_c_329.html
https://www.cobratactical.com/Magazines_c_329.html