Getting back off topic ........
Maserati steering bush:
Can't really see much from the diagram Richard. Looks more like a flexible rubber bung that presses into the bracket.
Sometimes a lathe is better for some parts, but if it needs to be flexible, there are flexable filaments available. I haven't printed with them yet.
Doing the cad drawing is half the work.
Suggestion ........ if you can send me a good one to take measurements from, I will draw it up,. That will produce an .stl file that can be printed.
It is going to trial and error so I can print it out in ABS to begin with, send it back to you, try it for fit and adjust as necessary. When we are happy with the dimensions, then decide what material to make it out of.