Poly leaf spring bushings

Get ya about a foot of black delrin ( plastic) from McMaster-Carr or from Stock Car Steel and Aluminium in Mooresville NC ( they sell on evilbay or online).
2 1/2" or 3" o.d.
Have someone turn some out on the lathe.
Not at all hard to do. Been doing it for years on oval track cars. You can press in a steel sleeve for the bolt if you like.
Pretty simple stuff.