I purchased enough parts to make 3 sets (4 ea.) of jack pads, at a cost of $9.01 per set.
I bought 12 hockey pucks on
ebay for $18.50, shipped. (
$6.17 per set of 4)
I bought 25 rubber bumpers from
McMaster-Carr for $10.18 + 7.48 shipping = $17.66 (
$2.84 per set of 4)
9540K35 - Rubber Bumper with Unthreaded Hole, Heavy Duty, SBR, Steel Washer, 1-1/32" OD, 5/8" High, 3/16" Hole, Packs of 25 $10.18
6.17 + 2.84 = $9.01
I traced around one of the pucks to make a cardboard centering template. I used this
video to find the center of the circle.
Placing the cardboard circle template on top of a puck, I then used a sharp pointed drywall screw to push through the center of the circle template into the puck just to mark the center of the puck. I turned the screw few times to make the mark.
Then it was a simple matter of placing a rubber bumper on the puck and screwing it to the puck using a 1/2" drywall screw. 5/8" screws would probably work as well, but I just grabbed what was handy. The attachment seems plenty strong, but if they start to come loose, I will replace the drywall screws with bolts and nuts.
Probably took me 5 minutes to assemble all three sets. I'll keep one set, give one to my friend, and may give a set to the Tesla Ranger when he comes to rotate my tires the next time. The last time he came, he didn't use any jack pads to jack up my car.
The first photo (kind of dark) shows the pad inserted into the hole on the underside of the car.