I can't give specific recommendations but make sure that you can actually get them up to the front wheels. The front bumper is quite low and the wheels themselves are a long way back from the front of the bumper.
I've made some "extra" sections that clip onto my ramps to make a sort of dual angle ramp which fits under the bumper right up to the wheel.
Hope that makes sense - I'll see if I can get a photo if you'd like one.
Happy shopping.
