I just signed up after finding this on the web.
I have exactly the same issue with RHS mount.
Rubber bushes disintergrated on a trip requiring removal of shockers.
When replacing bushes, I investigated and found:-
THERE IS A LARGE HOLE manufactured IN THE SIDE OF THE MOUNT, WHEEL SIDE
IT IS VERY HARD TO SEE
A BUCKLE (BEND) CAN BE FELT IN THE SMALL AMOUNT OF METAL THAT IS LEFT.
LHS IS MANUFACTURED THE SAME, BUT IS NOT BENT.
Any thoughts, remedies