i have a similar story. was driving to pick a mate up from work along milperra rd coming up to bunnings milperra, me in far left lane and semi next to me. far right lane a tyre truck was putting along (f*kin dodgy truck) tyre falls off, i didnt see it cause of the semi but swerved into the gutter wen i did, nearly mounting it and tyre wouldve missed my rear guard by a few mm's. crazy shit.
on your topic, check in the for for sale section of the forum as you MAY find an original 33 gtr bar. you could also go to jap wreckers (depending on location) but not sure if Just Jap at Kirawee have any (95450532), not likely but worth a chance at Sumo Spares in Chipping Norton (97247860) or Prestige Motorsport in Lansvale (97260505)