There are one or two 1917s in 45 Colt that have been lettered as correct. I believe both of them sold for over $10,000. I once owned a Second Model Hand .455 Ejector that is chambered in 45 Colt and has a 3 3/4-inch barrel. It was made for Mr. Herreshoff, a friend of the Wesson family, in 1916. The gun lettered as being correct. Below is an old photo I took of the revolver.
The "very special" revolvers are out there, but seldom seen or heard of. Sometimes they are displayed at the NRA Annual meeting or the annual meeting of the S&WCA.
Bill