This is my conversion of the astronaut mesh from the 3d resource page on the NASA site. (Thanks to  n0mad23 for the find.)  I have added some details, uv mapping, posed the figure  and created a simple module. The textures are pretty generic but I may update them later if I can find suitable reference images.
OperationÂ
Press J to toggle the head off (may be useful on slower machines - does nothing on mine). Press G to toggle the grease gun (not implemented: switch to BFG, drop tool bag).
Updated to fix the "upside down bug". You can now stand on surfaces.