Dude, I feel for you. I needed the same pulley and the dealer hosed me $400 Can for it
for the record, the 027 121 028 is 5.25" diameter
the 068 121 028 is 4 and 5/8 "
The dealer tried me with the larger one on the first order too.
I do still have my old one, PN 068 121 028, its in one piece, the slip pulley is fused to hub, some heat might unfreeze it. Yours if you pay shipping from BC canada.