Where I found small cases, to fit photo items.
All Electronics / An electronics surplus store
http://www.allelectronics.com/make-a-store/category/145/Cases/1.html
On the Link page above;
The 1st item PADDED MINI-POUCH // $0.50
Holds 4 AA-batteries (good-fit) or 2-cf card's / (a little spare room).
Zipper is nylon not metal in all cases Ok for Batteries
The 3rd down, left side LEATHERETTE BELT POUCH // $1.00
holds an extra Phase/Mamiya Camera Battery pack
pre-loaded with AA's.( a little loose) not much padding but
will protect the batteries conectors.
This pouch also holds the large extention tube (perfect) if you have an
extention tube get this one
10th row, right side (MP3 CASE W/ ARM BAND AND WAIST BAND)
I only use the case and discarded the arm band part.
This case holds 2 Phase batteries is padded very well 1/4 inch top & bottom
has a belt loop if you want to use it that way.
It holds 2 phase batteries just a tad of spare room.
This case is a little large for the Mamiya battery pack but a good choice
if you want the extra padding over the leatherette pouch.
Prices are good, I have several of all the above. The cases are made well
no isues with any.