Sure have, Ryan! I made polyurethane bushings for all my a-arms, both swaybar center mounts and both ends of all my old Konis. New Konis use steel heim-joint ends. Also made 2 sets of seat-track rollers from nylon. Easy lathe jobs. None of this made the slightest increase in cabin noise or a harsher ride, incidently.
When you buy poly barstock, you'll find some variations in hardness/compliance but even the softest is too non-compliant to use as swaybar ends; there you need sphere-ball ends. Delrin/nylon is normally harder than polyurethane & is available glass-reinforced, which can chip in use as a suspension bushing.
PANTERA INTERNATIONAL
A DE TOMASO CAR CLUB
Presents the De Tomaso Forums
The On-Line Meeting Place for De Tomaso Owners and Enthusiasts From Around the World
Clicking on the banner will take you to the sponsor's website.