Hello Whitney,
A good source for fabrication of crates, and supplying a cost estimate, is
EDE Corporation in Chicago. They've built both cases and exhibits for us
for years. Contact Franz Tividar, 4035 S. Western Ave.,Chicago 60609.
Phone 312-376-8400. Since I've been lurking here for a few weeks, I
should mention that I am an exhibit developer with Abrams, Teller &
Madsen, a museum exhibit planning and design firm. We met at an AAM
conference some years ago. Good luck!