Thanks Mog,
I posted this over at WhatIf, but forgot to post it here.
Years ago, I saw a Von Braun "Round the Moon" ship on Shapeways:

It was in 1/400 scale, so I asked the designer if he could rescale it to 1/350 and he did. I bought a copy and quickly realized how delicate it was. I managed to prep and paint it with only minor damage (the radio dish and the mercury boiler snapped off) but the white primer just didn't look right. I put it away for a few years and recently, I tried to remove the acrylic primer with denatured alcohol. The age of the print (6-7 years) or something else softened the resin plastic and barely touched the primer. I let it dry out and the print hardened again... but in the process, the frame never straightened out. I think they may have separated in some spots as well

This is accurately scaled (you can see a ghostly astronaut right below it) - compared to the Pegasus kit, it's the length of the cargo module.
I guess the only option I have is to use the drawings in the "Spaceship Handbook" and CAD up a version. I'll make it so it's easier to paint and maybe not as delicate (the resin Shapeways used is much more brittle than modern hobbyist resins). I just started the CAD work and it's moving along. Of course, the hard part (besides detailing) is breaking it down into reasonably easy to print sections.