I sold my Cougar in 1994 after three car seats did not fit. I have had some luck on tracking it around the country but lost it in 2005.
It was sold at the 2005 RodRun in Gatlinburg Tenessee by Rodney Kersey who owns RHK Motors in West Union Ohio. He said he thought the guy was a disabled or injured veteran and he remembered he lived 6 hours away but not which way. He said he was such a nice guy he took a personal check which he does not have records of.
It is a triple black car that he described as slick. It had interior work, new vinyl top, and paint. It still had the 289 that had been rebuilt.