I'm telling you, its best to just build some.

Here's a link Its super simple and not expensive.

 

RACE RAMPS! They're awesome! They are a bit expensive sounding when I'm seeing ppl pay $50 for rhino but well worth it IMO. I have yet to try a car that wouldnt clear. They're very gradual 03 Cobra, 350Z, lowered SRT4, a few classics and numerous other regular cars. Made specifically for low clearance cars.