the plastic bushes fitted to the yacht are from fallshaw, when I picked up my wheels I saw some plastic bushes in the parts bins in the warehouse- they gave me a couple of 3/4" and 20mm bushes to play with.
They are a push in fit with exhaust tubing (32mm?)
but at work I found urethane bushes fitted to leaf springs (in the dump

)
they are made by TERRAIN TAMER and probably aftermarket landcruiser parts.
i.d of 20mm, o.d. of 40mm part number 90389-14056P.
next landyacht I build

will be using these urethane bushes
plans bouncing around in my skull for a collapsable 2 seater..........