Hi all , new to forum but not new to S&W pistols! Second post so bear with me... I picked up a M&P 9MM compact, love it right out of the box! The mag with the finger grip/rest is the one I'm most comfortable with. Unfortunately, I was only able to find flat base mags when I looked to purchase spare mags. I'd like to order just the finger grip/rest for 10round mags , any one know the part number and where to get it??? Any help would be much appreciated.