Don't know how you are going with sourcing Dulon Acrylic lacquer, but some thoughts if it's any help...
some Holden dealers' parts departments were Dulux paint outlets like Suttons and McGraths.
Some Dulux industrial lines seem to have been taken over by PPG who also took over and market Protec paints:
http://www.protec.com.au/products/categ ... uer-systemPPG should have a formula for Crystal White as others on Ausmini have also bought from them.
I don't know whether it is still the old Dulon or a new version. The original Dulon was a great product and very easy to use by amateurs.