Gary,
triple black '71 cars are more of a rarity than you think.
Your story has a close proximity to a triple black Challenger I personally know of, but it's a 383 car purchased from the Boston area.
I have seen/heard of close to 21 1971 triple black Challengers. I am sure there are more, but the REAL triple black cars are abit of a rarity(smaller percentage take-rate), as the market trended to the hi-impact colors offered during that time period.
Mind you, this is my LIMITED knowledge, so I don't claim to be right, or wrong- its just a tabulation that I made from shows, magazines, enthusiast sites, etc.
What options did you have? I am sure if you posted more detail, you might get more respnse.
Dan