Earlier quoted context omitted.
By "3D print" you of course mean going to a home improvement store and buying some wooden boards and metal attachment pieces. 3D printing is totally unsuitable for the task, both because of low durability of printed objects and the time it would take you to print a pad like this (a few days, probably).
Really, that's the time it takes to print an object that size with off-the-shelf 3D printers? I have no experience in this area, so my (uncalibrated) expectations for 3D printing were that it might take a couple hours.
We're primarily using a Printrbot Simple Metal at my local makerspace, and I usually expect a solid object the size of my fist, 20% infill, PLA, to run 3-4 hours.