Delrin bushings

[DGraber460 at aol.com]

Does anyone have the dimensional specs for the control arm bushings on the 
4k, URQ, & CGT cars?
I have a lathe and can get Delrin rod from our vendors. I have made 
suspension bushings for old Jaguar cars (friends, etc.) form Ultra Hi 
Molecular Weight Polyethylene (UHMWPE), and would like to try to make some 
Delrin units for my URQ.
Do the commercially available units use a steel center sleeve? What sort of 
clearance do they have, e.g., press fit, etc.? Are they a mere copy 
dimensionally of the original?
TIA

Dennis