need complete 8 3/4

hey fabo brothers and sisters i need an complete 8 3/4 rear end from drum to drum or close to it, needs to be for an a-body preferably but any will do i can have it narrowed, needs to be an 742 casing but 489 would work, needs to also be 3.55 posi no other would work, please let me no if anybodys got 1, thanks J