anywhere i can find the colours that it should be?
Colour match is about the only way. No known formula's were kept ( that I know of) just find good piece of colour and match that. It's what I do,see how you go. I might be able to help don't know how but I can only try.
Cheers Blumbly
I guess I would be happy with just a picture of an original one...and just work off that