I have been looking for some high profile crystal case, and think that it is possible to make a 'crystal' case for HHKB out of two parts from similar materials that is used in some of those 'Acrylic CNC' cases.

Is there any open source case file available? e.g. for the 60% keyboard to begin with.
Have some members already done something similar? i.e. CNC milled their own acrylic case - I know many have their own CNC aluminum projects.