PPC Change Part Type Posting for an internal part number

Says, in PPC Edit Line screen WO information area, he cannot change the Part Type Posting for an internal part number used by a vendor for an outside repair. Advised him to use a slightly different PN in the PO Line but he refused.
He wants to be able to receive and post to a WO the same part numbers as internal PN for an outside repair and have them post at OP no P. This would allow him to view Part History/usage reports without having to remember an alternate PN used on the PO for the repair and stream line their reports.
Currently cannot do this in 7.1.1 or 7.2.1.

Imported from [WISH-302] PPC Change Part Type Posting for an internal part number