Bryan,
Here are some official photos:
http://www.beale.af.mil/photos/index.asp?galleryID=1456
Here is a brochure with 3-views of both the Block 10 and Block 20/30:
http://www.is.northropgrumman.com/sy...H_Brochure.pdf Sorry, no dwg/dxf.
For more Northrop Grumman-provided stuff, see:
http://www.is.northropgrumman.com/sy...a_gallery.html
And here is an interesting gallery:
http://www.air-attack.com/images/54/...obal-Hawk.html
You should be able to get pretty good scale data from those sources.
OBTW, there is an EDF foamy Global Hawk from Sonic Electric:
http://www.sonicelectric.com/Merchan...EDF-GlobalHawk
Good luck, and let us know your plans!