If you want something in a 1911 frame, look into a Coonan model in .357...they got a big ole grip frame.
I've got long fingers and have trouble finding anything that fits me better than square butt N-Frame target grips. John C. even made me a beautiful set of square butt N-frame target grips for my round butt Mountain Revolver...made all the difference in the world.
The thing about big and tall is that you don't get any sympathy from any of the little short guys.