Doepfer

Hi guys,  I am looking for recommendations on 12u cases that will stack together well for 
future expansion. So something that would hold 2 double euro racks and fit snugly together 
if the system expands. So potentially over time a synth would grow like this one has:

http://f9g.yahoofs.com/groups/g_3183706/.HomePage/__sr_/fa26.jpg?grAUmFIB5ewU62Mr

Does anybody know where this flight case came from?

http://www.doepfer.de/a100r_hr.gif

Many thanks