Thanks, J.T.
Funny how sometimes we ask a question, then next day we find the answer. Today I went into our nearby small town where a new panel shop has opened. Turns out the guy is an enthusiast for old cars. He had an old colour book on the shelf, & lo & behold. Belletts are listed (along with other rare breeds like Prince, etc.)
My colour is "Foam White" - colour no. 7164, and there is also the RECIPE. High strength White - 69 parts, Reduced Black - 27 parts, Yellow Ochre - 4 parts. using Dulon tinters in Balm paints Duco.
Next step is to get it mixed by someone who still does Acrylic (he only does 2-pack) and see how it comes out. I'll go back & copy down all the other colour recipes and post them in the hope it helps you & anyone else.
After I asked the question last night, I went back & read the other posts on this subject which I hadn't done previously. (Shoulda done that first!)
More soon
Matt.
Since then I found the 'Barn find'. It's a '65 and Doris is early '66. The paint is the right one for '65. It seems Isuzu changed the colour a shade between models. Gary Carter's '67 looks the same colour until you put them together. Again, a shade lighter. He needs a few spots doing, so he went to a restorer with a Spectrometer, who mixed him a litre. We will be doing the repairs soon, so will see if it is right. 
