Most of the flight case manufacturers can advise you on the shock mounting of computers - whether it be with foam or rubber mountings. Also, most have a solution for mounting Mac PRO's already and are usually very happy to customise so you end up with what you need.

Stage Sound Services in Cardiff have their own flight case manufacturing department - they have a large Catalyst stock and cases to fit every car/doorway/staircase etc. You can also get foam from them to fix machines in securely.

Nev.