I remember at my goto Mustang shop (2010 or 11), one of the regs was looking for a Termi. Ended up finding one that had 120,000 Highway miles. Good thing was this car had all it's work done at this shop (plus the heads were upgraded to blue dots) so the shop owner knew all the ins and out of the vehicle,and said it's worth the money. Dude bought it, replaced the rear with a solid axle and threw on some 10.5 SVE Termi wheels on the rear with drag radials. The car was mint with some minor rust (expected being from up here). He got a good deal. Was a sweet ride.
They are out there, I've been looking frequently at ones for sale through SVTP, High End auto, Marketplace, and any other places that had these come up on a regular basis. I could have been more picky but its really hard to pass up a car with the known owner and that it was not beat on.