I'm having the same issue with paint codes. So far the color codes I got from Dave Ponzler can't be matched. They seem to be a unique PC color codes (358E5, 359A3,358G5). Even the original Elkhart based S & S Auto, that supposedly painted PC coaches couldn't match these colors to send me a touchup kit. But I can add some info to this post.
On my PC the original paint was manufactured by Sikkens. Sikkens RV paint now seems to go by the name of AkzoNobel Sikkens, a European company that bought them out. It can get very confusing because Sikkens paint is very similar to PPG? In 2017 PPG changed and transitioned the name of Sikkens for some of their products????
I've seen on other RV websites that owner's have taken off their outside Frig covers and have had successful touchup paint matches. I did take my PC in for a paint match. However only one of the three colors were a successful match.
But I'll keep trying and if I get a place that can match the PC color codes I'll post it. And if anyone can help me out it would be appreciated.