I like to have bag or case for each of my kits so I know where ever thing is and to have just one thing to grab when traveling out and about. I have found a tiny little bag for the GR-DII and my kit for it.
A new mini-Domke (F-903) case with my GR-DII and possibles packed. Film cassette for scale (remember those?)
Every thing packed in there.
GR-DII and CV 28/35 min viewer mounted
40mm and adapter with CV 40mm viewfinder (these are packed in the black sack that comes with the 40mm GT-1)
Gepe Combi case with spare battery and 2 SD cards
Third party charger for both wall and car with cable
The case has the spiffy little handle and very long shoulder strap and belt loop. It makes a nice home for all this when parts aren't in my pocket.