I'd like to replace the body mount bushings on my 67 Elky. I want to use solid mounts. I haven't found any offered so I figured I can make them from Delrin. I have some 2-1/4" round material and a lathe. I need to know the thickness to cut it and the diameter of the hole. Short of actually pulling one out, you guy are my best bet. No street use, strip only. Thanks,