Don't give up on your research. Did you call Colt Archive Properties or Colt Manufacturing? I am not for sure but have heard that they are two different divisions. There were 2 Colt SAA in the 141000 serial number range taken from the so called Invaders by the US Cavalry ( #141080 and #141475) after the invasion referred to as the Johnson County War.
I am doing research on a Colt 1877 41cal that was possibly connected to the Johnson County War. I requested and received a letter on it from Colt Archive Properties ( they are a joy to work with). My revolver went to Schuyler, Hartley & Graham in New York. Their records have since been given to Cody Historical Museum in Cody, WY. I am now researching the records - big job. But don't give up keep looking. RR