Have I got a deal for you!
(We bought the original tooling some years ago.)
I'll have to confirm with Peter, but I think that a full set is about $6000.
Includes these castings (no machining):
COMPLETE SETS OF CASTINGS
INCL: TRANS & DIFF CASTINGS
AND ALL COVERS AND INTERNALS.
MAGNESIUM AZ92A-T5 FOR CASES AND
COVERS, BRONZE CDA955 FOR INTERNALS