I called PPG and talked to them about it.
They no longer have the formulas for Pearl Beige.
They do however, have a test panel left over from sometime in the past. They said that I should have my paint mixer call them when I was ready. They would then pull panel #21122 and have it analyzed to create a formula for the paint chemistry I wanted to get.

A lot of effort when all I want is a pint of air-dry enamel to use for touchup.

And I don't even know for sure if my truck is the same color Pearl Beige as PPG's sample panel.

I may be better off taking some part of my truck to a local paint store that has a color matching lab.

Leon