I would not recommend buying interior paint from any of the big parts vendors.
If they don't have any idea of what type of paint they are selling or know how much reducer & catalyst to use....I imagine the color is also wrong.... that should be a big red flag to stay away from that stuff.
I have seen references to this paint in PPG & Dupont color codes but, none of those colors really looked like the original to me.
Best route to locate the original "champagne" interior color is to find a few remnants of it somewhere in the cab & take it to the paint shop for them to match.
I can tell you that the original interior "Champagne" paint was a semi gloss & was semi-metallic.
So.. once you get the right mix of color.... you will need to ad a flattner agent so it is not too shiny once you spray it.
Here is an original part that still retains the factory interior paint to give you an idea of what color you are looking for...
![[Linked Image from members.cox.net]](http://members.cox.net/pictures4755/IMG_5125.JPG)