I called the SCCA to get clarification on SCCA approved roll bars.
The first thing they said was the SCCA does not "approve" any roll bar but does have recommended guidelines. So technically speaking there is no SCCA approved roll bars. That being said, if you read the
current SCCA rule book in Appendix C on pages 232-234, the Hard Dog Sport meets all the guidelines for construction. Also, Solo I is no longer around according to the guy I spoke with so it seems "Solo I approved roll bar" has even less significance. As for the broom stick test, I personally have never seen or heard of an event that performed one.
You might want to call "a local vendor" who is allegedly offering a sale on Hard Dog roll bars for the month of September or so I've heard.