Are you assuming the RPO 249 is NOT the standard rear side panel light? Never seen a panel or suburban without the standard oval rear body panel lights that have some other light there instead, if that is what you said? I have seen additional lights added. I forgot why we are discussing this. His pic shows what he has. He does not seem to be asking about the lights you mention and ask him about or adding lights. He says "originals aren't in the worst shape" etc. Are you just telling him he can add more lights or are we getting off topic? I believe his original question has been answered.
1TON: it does look like you still have the original flat lenses on the fender. Excellent and very rare. Not reproduced.

Right is right, even if everyone is against it, and wrong is wrong, even if everyone is for it. - William Penn