...to make these myself.  I'm stumped.  Thought about buying a bicycle tire tube and cutting 2 out.

 

Cut two flat pieces of stiff rubber.  Cut out the holes, lay one on the other then use polyurethane sealant to join the edges.

http://www.zzxdatsun.com/catRubber.php ---Banzai Motorworks

http://www.240zrubberparts.com/apps/webstore/products?page=2 ---nix240z

Same price from either if your buying,--- not to dissuade you from DIY

Jim D.

"Zup"

It's hard enough making them in a mold,

 

Steve

I cut two pieces 1.5" long off a heater hose I found in my hoard pile, drilled 1/2" holes through them.  It's a little thick but works great.  Also cut a couple of square pieces for the inside nuts and washers.

 

I was so excited to have these new bumpers I had to make do with what I had here.  I'm going to get all the right stuff someday.  Shade Tree  .

i haven't installed my rear bumper yet (came in the mail just before the holiday!!) but when i did my front, a while back, i simply bought rubber fender washers from the hardware store. worked a treat and very cheap. they had a big selection of sizes, found a set that were perfect. also allowed me to shim just the right amount for the fit i wanted.