I don't have my parts numbers memorized, and when I hear crossmember I instantly think of the rear final drive crossmember.
Are you talking top parts, as in bows, or something else. A bit more description would help, as a "naked part number" doesn't ring bells in many instances (though it's absolutely great to have, and something not often provided).
Keep a detailed diagram of the bolts and their direction, the Bellville washer locations, etc. The horizontal compliance bushings will have to be removed and they have lateral shims and an absolute PIA to compress to re-install. You have to use the factory method to compress the compliance bushings.