Hopefully these can be of help:

Stripped for paint and original bushes removed


During enamel coating


After coating and bushes fitted


I found that the original bushes were bonded rubber to a metal outer which was pressed into the arm, possibly with the arm heated to allow a tighter fit. With all that removed leaving just the arm itself the bushes i got from Floflex were a tight but good fit, required ever so slight filing of the inner edge to get them to press in square without catching and twisting, and a wipe of copper grease helped too.

They do look quite chunky and fit very snugly into the inner mounting points on the car.