I found a local source for bronze bushing, but they are too big for anything already here on TV, and they have a notch on the side to boot, so I designed a replacement. These bushings come off of various laser printers and copy machines. Might not be too difficult to come across when dumpster diving.It's a tight fit, so I stick my index finger in as soon as the part is done, to open it up and cool it. Probably not a good idea to print more than one at a time, unless you make changes to the scad file.I use a vice to press fit the bushings.