Travelers includes roadside/towing coverage in their personal auto policy, but I doubt they sell it as a stand-alone coverage (I'm not sure which you're asking about).

My office has Zywave's Broker Briefcase, I don't think many of us actually use it. I find it useful when an insured wants an explanation of certain coverages (Hired & Non-Owned Auto specifically), workplace compliance posters or help creating an employee handbook, but that is about all I use it ...