The inner bushes are standard Mini bottom arm bushes.
I could not find out what the outer bushes were from.
In the end I made my own from polyurethane rod supplied by Superflex with stainless steel pivot bushes.
http://www.superflex.co.uk/sprods.phpI think the 1" diameter stuff is OK in 80 Shore hardness.
If you're really stuck I could machine some for you if you know the dimensions you need.
