years ago, i made some pinch weld pads for a floor jack from "unistrut" material. that's the stuff that comes in 8foot [and longer] lengths that have a bunch of slots in it. it is about 1 1/2" square channel, made from .100 or so thick material with rolled edges at the channel opening. i cut these in 8" [or so] lengths, and welded a plug that fit my floor jack in the middle of the piece opposite the channel opening. no padding on the top side, but these things worked surprisingly well on solid rockers, and the pinch weld lip had lots of clearance. don't know if i have pics of these or not. i'll have to check.