Two aluminium pistol grip covers made by Fatman now in stock at Get Reload. These will fit the Tokyo Marui 1911 MEU gas blowback airsoft pistols and may just also be fit with those other brands that are compatible with the Tokyo Marui one. Two colours are available and cost US$16.00 each. You can click to the product pages below:

FATMAN Aluminium Pistol Grip Cover for 1911 MEU (Titanium Purple)

FATMAN Aluminium Pistol Grip Cover for 1911 MEU (Silver)