Chris Matheson from Queensland ran DLRA (#380) and Bonneville (#351) with a 97 Thunderbird and has one.
I think they are all built by the body fabricator as a package to the NASCAr specification that applies.
You might do well to contact him.
The SCTA book lists the C/BGMS as open with the one above at 231.516 and the one below at 242.411.
C/BFMS as open also with only A, e, and G standing.