"And while I can find no other pictures to corroborate it, I can find no pictures of any of the pilot's aircraft, leading me to believe that it is more likely that this skin is accurate,"
That's a non sequitir. ("it does not follow")
That's not logical at all.
You can't find ANY references of the real plane, so it must be accurate?
I'm sorry but I've run across MANY color profiles that are wrong, inaccurate, poorly colored, you name it! It's an artist interpretation, and the older the book often you run into printing problems where they can't replicate the proper colors (say, turning a grey into nearly black-green, or something).
You can't use those as reliable resources, unless it happens to match similar other planes, or has no special markings (say a generic camo on a 109f, which was semi-standard) or some other reason.
You just can't justify skinning this plane. I'd have done it years ago if I could have.