I found this model on NASA's 3d model repository. I didn't realize it was already on Thingiverse. I redesigned some of the parts because I was having trouble printing them the way SASInstituteInc created them. I've only included the parts that I redesigned here. You can get the originals to do the other parts from the NASA sight I linked or from http://www.thingiverse.com/thing:351983.
Oh and I made a simple stand for it.
I used ABS so I could solvent weld all the pieces into place. The hatch should click on to the hinge piece and stay without gluing so that it is still moveable. The hinge has to be glued into place. The rest of it might stay together with a friction fit, but that will depend on your printer. I went ahead and glued mine in place.