I finally found a pet ramp that is a good size for the PC step. My 4' aluminum ramp from the ClassA was longer than I needed and there was no place near the door that it could stow without being in the way. My plastic ramp from the van was too thick and created a treacherous tripping hump where it rested on the step...also not easy to stow. I found this one, 36"x14" (and there is a 12" wide available) on Amazon.http://www.amazon.com/gp/product/B00JLRR3DU/ref=oh_aui_detailpage_o07_s00?ie=UTF8&psc=1
Sturdy aluminum but light and thin and easy to stash. I peeled off the black tread because it was hot as a frying pan in the sun and replaced it with light sand colored aggregate anti-slip tape. I did the PC step also because my old dog was also having trouble with the visibility issue of the black step. Even with the kwikstep light, it looks like a hole from above to the dog, instead of a stable surface. I don't know if the tape will last as well as the original, but we will find out. So far my old girl likes it very much.