the bearings dont fail it inner ring is made of coke can and wears a groove and there toast after that
you will need to make up a small spacer to go between the inner rings for one and cut down the existing flanges for spaceing of the linkage block
i did ando's more than 12 infact 18 months ago and there still sweet
word of advise too, if you have been doin decent jumps on the rev then be sure to check all the bolts in the linkage.
all mine were bent and the stock ones are only mild grade.. had never bottomed out either, so goes to show how much load is on those bearings and bolts..