I think some manufacturers at Shapeways already have a Fokker Eindecker out. I actually had requested an Albatros CIII and he said no problem. I believe that those planes you mentioned, Frederick are all available at Shapeways in 1/144 scale so it's just a matter of getting them to upscale them.
Going big creates problems, apparently. The main difficulty being that most consumers are unwilling to pay the price for a Handley Page. I saw one in 1/144 scale for $80.00 USD. One in fine detailed plastic was $452.00 USD. Enlarging to 1/100 scale would certainly be more.
I haven't seen a Brewster buffalo yet but they do lots of WWII planes.
Once the model is built on computer then changing the scale from 1/144 to 1/100 is not so difficult. My main concern is the texture of the finished plane. If anyone here has ever seen 3D printed models they know that often there are layer lines and other distortions of texture that might make the finished product unacceptable to some.
My next step is to order a WWI plane in my 15mm scale, determine if the quality is worth the price, then paint it up and present the group with a few photos of the finished product. I have a feeling some sanding, etc. will be required, because I don't want to pay the high price for fine detail. I will let the group know the progress.
Cheers!
Gallo