Hey Pard!......Welcome!
I love this subject and I did a little thread here some time back that has a bit of "gas bag'n" in it about Super Blackhawk hammers into OM Vaqueros after it became "SASS Legal" to do so....
These "Old Model" parts came from MidwayUSA and Brownelle's {Numrich too
} and they slip'd right in and it was a fun project....
I would think that the "SASS" New Model Vaqueros that have the Montado hammers in them would go in reverse of what I did to the New model SBH....
The "Bisley" hammers had different part numbers on then and I did NOT want to take the chance that they might be different so I did NOT mess with them but I'm bet'n that they WOULD have worked....
{Why re-invent the wheel as I suspect that the internal section of the hammers in ALL the SA Rugers would swap....
MAYBE}
I like the SBH hammers more then my Bisley hammers 'cause they're wider with the knurling more aggressive and I'm guessing that the Montado hammers are very similar to the Bisley style too.....
Good Luck and HAVE FUN!