There is now the TM 40 round mag for TM 1911s(and MEUs) and clones. For real steel, there's a few companies making them, I'd like to see CMC 10rnd PowerMags in airsoft. And I personally have yet to see a snail mag for the .45ACP 1911.
SRC HK416(D10.5) gen.3 pro
KJW MEU(SOC) pistol (cansoft)