Ironically, most of the Aussies I've spoken to can't get the PBR stuff for anywhere near the pricing we can get them for here...go figure.
As for your Wilwood kits, the hubs/rotors/calipers and associated mounting brackets and hardware tend to be specific to the application. While many of the Wilwood calipers share mounting patterns, most are not common with either PBR or Baer to the best of my knowledge. Wilwood does offer a few limited caliper options which include dust seals if that's the technical legal problem with your current setup, so I would probably start there. That may solve the front issues with calipers only, although since you didn't specify whether you're running their Superlite or Dynalite 4-piston calipers in the rear, I'm not sure about that end.
You can sort on Wilwood's website by "
dustboot" if you would like to see caliper the options available.
HTH,
Tobin
KORE3