Trouble getting Portland grey paint mixed correctly for gts dash facia

[Kyuss]

Has anyone else had trouble getting the 'portland grey' colour mixed so that it looks as per original for HJ/HX gts facias?

I've had two different paint shops in Ballarat mix me some in a pressure pack and both aren't even close in my opinion. Does anyone know the actual dulon code for it? Am I right that it's called Portland grey and is from 1974-5? Thanks in advance

[mr.jones]

Code is 4045 or 4H009

Formula is

Tinter Setting
3038 154
3924 417
5431 495
1012 500

Tinters

1012 White
3038 Flattening Base
3039 Medium Met
5431 Black

Let me know how you get on

[Kyuss]

Okay thanks and will do...should have asked on here first shouldn't I!