I remember this article along with several others over the course of the late 80's through early 90's that featured this particular Saleen Mustang.
It was/is actually James "J' Bittle's personal Saleen Mustang that he purchased in 1987 & was used by the various incarnations of his aftermarket Ford performance shop, J. Bittle American (JBA), as a rolling test bed for many of their products, such as their now famous 5.0 shorty headers. If I remember correctly, J. Bittle originated the shorty header that was copied by just about every other aftermarket company & became the basis of the original Ford Motorsport/Saleen SSC headers. J. Bittle was one of the pioneers in offering 5.0 performance parts when there was simply no such parts available.
Anyway, J's personal Saleen Mustang went through as many incarnations as his company & I believe he may have sold it years ago as I haven't seen it in a long, long time.
The Dominator Mustang was a completely different Mustang that J. Bittle tried to offer as a turn-key tuner Mustang to capitalize on the burgeoning 5.0 aftermarket started by Saleen. I don't believe he ever built more than a hand full of complete vehicles (if even that many). I know of at least two here in the San Diego area that regularly appeared at the car shows hosted by JBA & the San Diego Mustang Club. JBA then attempted to offer individual components such as the body kit but they never proved to be very popular. Eventually JBA sold the molds to the now defunct company called Mustang Power House or MPH who marketed the kits for a couple of years.
The link provided by FAS8N provides a fairly good over view of the original Dominator's history. Locally, Mr. Bittle's & JBA's historical reputation isn't quite so glowing.
But that's another story.