Try the Rhinos first. Then go with the boards if needed. My older set, I have a couple of 2X10 sections screwed together as mentioned above. Works great. But my cars really, really bad, with a long overhang and a low to the ground fascia. If your are some old school metal ones, then the Rhinos should work fine. Link is to a Google image search for Rhino Ramps. Shows them under a bunch of different vehicles, and in the packaging as youd see them in the store.
Rhino Ramps - Google Image Search
Chess, you never did tel me if they worked for your car without boards. Someday soon, I want you to bring them over so we can try them on mine, which I think is a worse case than yours. Or, next time I come by your place... now that my brain engages.