You can do what I did for jack pads. I took a 12 foot long 2x12 and cut it into 12 one foot pieces. I then put a large screw eye in one edge of each pad and attached a three foot length of rope to each screw eye.
Having 12 pads gives me the ability to arrange them to help level out uneven parking spaces. If the space is level I just use one pad under each jack. If the space is un-level to one side, I'll stack multiple pads on the low side so that I don't have to extend the jacks too far.
It's an inexpensive way to build multiple jack pads instead of the paying an arm and a leg for the plastic pads. Also, if I ever bury one to the point I can't get it out off the ground it's no big deal.