I imagine it wouldn't be hard to do this at all. Just take the standard pistol model, dupe it, fuse the two together, throw silly putty in the seems, and release it. Or you can make a custom model. I'm not picky, I'm just throwing this request out there. Askers shouldn't be choosers.
Pic related:
Edit: Also, fun fact, the original 1911 is one-hundred and four years old.
