I used a new carrier bearing assembly, one where the carrier housing, rubber insulator and bearing are tied together unlike the stock unit where the rubber just slides right out of the housing. I’m keeping the old setup but Desert Valley Auto Parts (623-780-8024) in Phoenix will probably have what you need in their yard. See my latest driveline post where I put up a pic of their partial inventory of 61-63 Cutlass and F85s. Between the Buick Specials and F85s they have at least 2 dozen or so. They ship out a lot of parts every day.