WECO Lacquer Primer is a great 1K urethane primer option, and at $84.00 for a gallon is a great deal too! 
Stop by WECO today to pick up a gallon, along with the best matched auto paint around and great deals on clearcoat. Might as well get some sandpaper while your here, too. Oh, and Masking paper and tape (can't forget that). And, since your here, go ahead and get a Mig Welder while your out and save yourself a trip.