What version do you have? For the last several years there have been some basic Rockabilly RTs that are IMO very good. We used them a while back and several forum folks have posted productions with them. And there are other ways to get an earlier rock sound by “auditioning” RTs and RDs w/o using a specific style. For our current post in the User Showcase forum, See See Rider, we used some BritInvasion tracks for an early 60’s sound.

Bud

You can check it out here:
https://www.pgmusic.com/forums/ubbthreads.php?ubb=showflat&Number=574644#Post574644