This conceptual design could allow one to create vacuum formed parts almost anywhere. Features a modest build area while small enough to fit into a briefcase!
Source File Credit:
Handle (http://www.thingiverse.com/thing:1228617) by j0s3b4
Bowden bracket for FT-5 (5mm bowden version) (http://www.thingiverse.com/thing:1670620) by jterranella