On Sat, 17 Dec 2005 07:30:48 -0500, GD wrote:

I was wondering if anyone has cast urethane like they use in
suspension bushings?

Talk to Smooth-On, who make such things. They're very helpful people in
selling small quantities and they're generous with product information.
If you're in the UK, deal through Bentley Chemicals.

Pouring is easy, but it's worth rigging up to vacuum degass the poured
moulds. A simple vacuum handpump is adequate - I do small stuff in one
of those Vac-U-Vin coffee jars.