Take a look at this Titanium Flash Drive housing I finished up today.
For the innards I used a SANDISK 2GB Micro Cruzer.
The overall dimensions are .375 X .972 X 2.375.
The back has a slot with a 2mm X 12mm Purple Self Lighting Gas vial installed.
To hold it together I used 6 #2-56 SS socket head cap screws.