If you will make them I will give them a shot for sure! It's be great to keep expanding our store on here and to have a place to get them easily! I wonder how the 4 different types of materials would test against each other. Brass vs Delrin vs polyurethane vs aluminum,,,, I would say steel but I bet they would rust and seize unless you've got REALLY good seals. And steel on steel wouldn't pivot well either huh? Hmm....