Hi Kevin,
Personally I have not come across a manufacturer of a "off the shelf" King Pin Bush in Vesconite Hilube. I think you will have instigate the manufacture of them yourself. If you do not have the facilities to undertake this yourself then you can approach any competent Precision Engineers who will able to produce them as they do not require any specialized tooling in the making them. I have made reference to this subject in a previous post
http://www.talkmorgan.com/ubbthreads.php/topics/218288/Re_Front_suspension_longevity#Post218288 The material itself you will have to obtain from Vesco as they seem to keep a tight control on its availability, but its website is very informative regarding the design of Bushes
