All body colour doesn't look "right" to me, although you may well be right. Searching the internet, there seems to be no set pattern, I guess so many have been messed about with. I think I'll go limestone roof and back panel. If I ever go back to fully original I'll put the limestone colour full length roof back on, currently hanging from the roof in a shed.
I am only painting the roof, as it is from a different vehicle, and its rougher than you can see. I love the patina, all done by family over the 43 years we have owned it. I will though replace the LF guard as it's pretty bad and I happen to have a spare one. My panel / paint guy has been tasked with painting it sympathetically...