There's the Automag. Mind you, I don't care much for the current High Standard Company but, with that established:
http://www.highstandard.com/brands/amt-automag.html
Photo from Jeff Quinn's
Gunblast
In general, it's a very long cartridge. I'd love to see the 1911 offered in .22 WMR, but the .22 WMR is a longer cartridge than standard, 230-grain .45 Auto ball ammo. The .22 magnum won't even fit into a 1911 magazine.