I got 2 ProMag brand 8 round magazines for my 9mm Shield on eBay for $19.35 each, free shipping. I'm not affiliated with the seller or promoting eBay, just thought it was a good deal if you're in the market for more Shield mags. They seem like very good quality, made from blued steel instead of stainless. Will be used for range practice only.
search for eBay item #171979997487
search for eBay item #171979997487