Wiardgroup

I've seen photographs of both Serge and MOTM modules in SKB pop-up 
cases. Buchla modules are quite shallow, also. I would suspect that 
all the 3U Euro-rack formatted systems fit in as well.

Wiard modules are 6U high, not 5U. BTW I've never heard of a case 
with an odd U number (would be very nice if they existed, though).

Until you have the exacting measurements for depth, you could use 
this rear view of rackmounted Wiard at Michael Firman's website: 
http://www.mlswebworks.com/mafwiard.html

Thermodyne cases are a reasonable alternative with many more options 
than SKB, from light and slim travel briefcases to more bulky, but 
extremely resilient mil-spec cases. They will make custom fitted 
innards (rackrails, shape-fitted foam padding etc) also. 
http://www.thermodyne-online.com

SK