Howdy
Yup, Bob Wright is correct. Damascus barrels for shotguns were made up of laminated and twisted layers of iron and steel, welded together to form a tube. This was done because a good way to drill a long, straight hole through a bar of steel, long enough for a gun barrel, had not been invented yet. Knives and swords were also made by the Damascus process before modern steels were invented. The Damascus process for a sharp blade resulted in a blade that was hard enough to hold an edge, but flexible enough to not break when stressed.
That's pretty much it as far as Damascus steel and weapons are concerned.
The slide on your Dad's 1911 was made from an ingot of Damasteel. Damasteel is made by a company in Sweden. Damasteel is something like old fashioned Damascus steel, but it starts out very differently. Damasteel uses modern powdered metal technology to make its ingots, very different than the way Damascus barrels were twisted and welded together. The ingots are then conventionally machined to final shape, such as the slide on your Dad's 1911. After machining an acid etch brings out the patterns in Damasteel.
The bottom line is, nobody is making what you are looking for. Nobody is making a drop in kit of Damasteel hammers and triggers for Ruger revolvers.
By the way, your Vaqueros do not really have Case Hardened frames. Ruger used a chemical wash to simulate the colors of case hardening. If I recall the term they used to use was 'color case' or something like that so they would not get caught in a lie. There is no point Case Hardening Ruger Investment Cast frames, they are heat treated to be hardened all the way through. True Case Hardening such as Colt still does is a much more labor intensive, expensive process.