Steve I can't believe you threw out Holden parts lol!
Not many WB bucket seats around as there were no sedan versions unlike HJ-HZ. Plus most WB's with bucket seats became B&S machines and did not survive into the 2000's let alone the 2010's lol. They are real hard to find.
One of the hardest parts to find for HQ-WB are WB commercial bucket seat belt stalks, bucket seats, console lids.