It's strange the number of times names get reused or changed for different models in the States.
In the UK, the VTR Superhawk is called the Firestorm and its upmarket brother the SP1, (RC51 in the States).
Going back to the early 60s, the 305cc CB77 was called the Dream Super Sport, in the States it was called, you've guessed it...the Superhawk.
Did you check out the forum that bigjoshl posted Simon?
Sam.