On my '69 Buick Skylark- and this applies to most of the GM 'A' bodies.
Chevelle, Tempest, Cutlass as well. I've found the following interchanged with HQ-WB.
Note the Camaro is an F body, so not all may apply.
Front upper control arm bushes. ( not all A bodies though)
Front shocks. The Konis from my HQ went straight in.
Rear control arm bushes (not much good to you on leaf sprung Camaro)
Front sway bar bushes.
AC compressors in Holdens were US made, so they should interchange.
Beware of differing pulley sizes though.
Rag joint at the steering box to steering shaft connection.I used the a HQ one on to the Buick brackets.
Pontiac Rally wheels.
GTS wheel nuts.
Not sure re chassis rubbers. I wouldn't be supprised though.
Even the brake pedal pad from a WB went straight on to the Buick.
Bottom line is that there's a lot of interchangability 'twixt Holdens & American GM. It's great.
I've used
http://www.opgi.com/ with good results, but there's plenty of others.