You can find aluminum ramps at Home Depot for (I think, we dont sell to many) about $79. I made a set from 2x10s with the ramp ends that I found at another hardware store. I used the 2x10s because thats what I needed in order to get over my wheelwells if I have to haul 4x8 sheets of plywood. My ramps fit along the side of the bed on edge and are braced apart (from sliding) with more 2x10. The whole thing creates a platform that I can easily knock down to load a bike in back. Straying a little further from your question, I next put some eye hooks and cables and made leashes for my dogs so that they can ride in back and I can leave the cap window open when I am doing some shopping.
96 STX 4x4 Extra Cab
4.whoa 5-speed (rebuilt unit by Kormex Transmission - EBay seller A+ from me)
Rancho RS5000 Shocks
Bridgestone Dueler 31 x 10.5
Lakeland colormatched cap[COLOR]
Silence is Golden...Duct Tape is Silver