I did a while ago, but shock orings from my Mugen that were laying around.
Was pm'ing with someone about stuff and noise was one issue and I suggested the same as I did. He didn't have spare shock orings... but plenty of the up travel limiting orings from this kit and said it worked great.
later when I had the truck apart I pulled the Mugen orings and used the thicker Tekno ones and it filled the gap a little better and made it even quieter. Truck used to sound like a chainsaw