I prefer to purchase bushings. Bushings are not difficult to make with a metal lathe tho it does take some time so if your time is only worth five bucks you can make them. Or if there is a machining club or someone in your area who does this for a hobby I'm sure they would be willing to make a couple of bushings for cheap or free. I make them when I don't want to wait for shipping or delivery. I also will make them if there are no bushings available. Mine will often be more accurate than those from the big suppliers. I make mine for a nice slip fit in the tube. I just make mine from 12L14 so they are not hardened but they work. Funny thing. I made these bushings for a PSI Gatsby. There were no Gatsby dimensions in the charts in the library. Fortunately, the included directions with the kit gave the bushing dimensions. I used the measurements given and then found out the bushings were ever so slightly undersize. There is a slight movement in the tube. It will work but I should have used the tube to check the fit rather than a micrometer.