My second CAS firearm was a 3.5" Cimarron Thunderer in .45 LC/.45 ACP which was eventually joined by a .45 version with a 5.5" bbl.. Both have checkered grips. I love the guns, both as shooters and as lookers. While Col. Flasman is correct and no gun like this emerged from the Colt factory, I am sure that a competent gunsmith could have changed the grip frame to one similar to that of the 1877 Colt DA if they were asked to.
I like the look of he Colt 1878 DA Frontier, but the guns are notoriously finivky and, besides, DA guns aren't SASS legal. I looked at the USFA Omn-Potent, which has a profile and grip frame much like the '78 Colt, but at first they weren't SASS legal and even now, they are still quite a lot of money.
In a game where Rugers -- a 1950s retake on the classic SAA - reign, a little playing with history isn't unwarranted.
If you like 'em, shoot 'em.