I would like to market some modest upgrades to owners of Duramax, Powerstroke, and Cummins light truck diesels as a diversification to my auto repair business. I am trying to find the appropriate place to advertise. Being in California, I do not have access to DMV records of the specific vehicle owners. I don't want to position myself as a hot-rodder shop, either, as I'm afraid it would scare away the little old ladies for whom I do vehicle maintenance. I am interested in tapping the trailer-towing crowd and perhaps the contractor types who like to go fast.
Any suggestions as to how I should reach the market with advertising?