Yes, they have made a few starting in '95 for the street cars if I am not mistaken.
I know of a handful of them.
1995- December 1999 production would have had the 351-SC power from Saleen.
Jan 2000 on street cars (Saleen SR) would have had a modified "E" motor rated at 505hp. (4.6l w/ the Gen V SC).
No cars were made during the lull of the 351 expiring and the "E" coming out.
The above should be correct, but I would have to check the Saleen book to double check.
-Mike