Correct, the right one is a 680T that flies in Russia with the original -43 engines. I used to remember its N-reg number, but I have forgotten.
Haven't heard from Glenn in years, I'll drop him a text and see what the latest is on the 680FP.
For the new members: that 680FP was owned by a larger-than-life character named Moe Mills, who used to make racing pistons at Ross Racing Pistons. He was a wonderfully vibrant and funny human, but died in a freak head-on accident where a couple of drunk teenagers came across the wrong side of highway without lights on at night. Glenn bought it off the estate, but it was always a fire-breather and not sure he ever got the pressurization entirely working.
UPDATE from Glenn: He still has the 680FP, but it's out of annual. He's busy flying his Lockheed 12.