Thanks everyone for the positive comments, and thanks Skypig for the photos. Actually I have to give most of the credit to the excellent close up images from David Little. I never did find readable QM drawings for this item. The wheels, springs and some of the bar stock are of specific known dimensions, so I was able to scale the rest of it from there. Of course it had to fold up, and had to fit a standard litter, so those dimensions are fixed as well. The carrier is 100% functional. All in all it was a pretty straight forward job, and it is within the capabilities of anyone with basic machine shop skills and access to a welder. I would be glad to send directions and parts sources to anyone interested. Send me a PM, and I will send drawings via real mail.
I am looking for litter securing straps and also the splint bar. I am a little concerned that the elastic in the original litter securing straps may be no longer useable after all these years.
By the way Skypig's rations were the most authentic I have ever seen, except they actualy tasted good. I won't let out his manufacturing secret however. We tried a new D ration bar that weekend too, and it was just as awful as the original!