I too winch on and off. I use a Super Winch “ winch to go” which is a 4,500 lb winch in a tool box mounted to a plate that you can mount to your floor or use the straps and u bolts included to “ tie off” to something. The wireless remote and winch does cost more than Harbor Freight but is much more precise.
If you are still are still looking for “ risers” search for “ ramp overs”. Race guys use them so look in that world.