Here's a new Spring Bushes Kit (x14) for the Following cars from MG -

MG

MG YB   (From 1951- 53)

(Not for the earlier MG YA of 1947- 51)

Included in this kit are the following -

x4 Spring Pads 

(These fit on top of and under each spring).
 

x2 Spring Eye Bushes 

(These fit in the front eye of each spring).
 

x8 Shackle bushes

(These fit in the rear Spring Shackle / Hanger).

This is enough to replace all the Rear Spring Bushes on one car.