Hi Roverman,
I see you are in Mesa AZ.😊 Have you contacted the local Cat dealer - Empire Machinery - at the freeway and country club for the paint?
Roverman, The DuPont number for Old Cat Yellow in their Centari Acrylic Enamel is: 421A. Here is a pic of a D-2 painted with it.
The Caterpillar part number for the old Highway Yellow is 4C4185. They quoted me $54.00/gallon for it. The DuPont 421A is $145.90/gallon plus hardener plus thinner. I have just used the Caterpillar paint and it works great. The DuPont will probably last better though.