Experienced paint guys I have a question

A competent painter with the right knowledge and equipment should be able to match your older high VOC base using waterborne base pretty easily.
In SLO county CA we've been having to use waterborne base coats for about a year now. As long as the painter is used to the new system it wont be a problem, you can mix just about any color and tint them to match (they have the formula for my duster E9 vintage red metallic).