I have a set of 1996 Caldina front discs & calipers sitting at home.
The calipers were replaced with the ST185 GT4 twin piston ones, but the discs were already the right diameter & thickness, just with better venting.
I've now upgraded to ST205 discs & calipers.
These parts will bolt directly onto your car, & are just sitting around at home doing nothing. I can't reinstall them as I modified my front hubs to fit the ST205 stuff.
Pads are only 5000km old & are similar dimensions (if not, a little bit bigger) to Aussie ST185 ones.