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Here are some on-line stores that have the wooden cases. I'm sure there are lots more I missed. Some of the cases are slightly taller than the ones I used. You can easily add one or two rows to make the patterns fit if you need to. Some of the cases I measured were 2.25" tall and some were 2.3". I guess we can't expect precision with a very inexpensive item!

BEAD STORES - U.S.

Sova Enterprises

The Bead Shoppe

iBead.com

Black Giraffe

Beadcats

BEAD STORES - OUTSIDE THE U.S.

GJBeads (UK)

Dragonfly Dreams (Australia)

Daaft Designs (South Africa)

CRAFT - FABRIC STORES

Joann Fabric

Sullivans Quilt Shop

Nordic Needle

Calico Spice

eCrater

E-BAY STORES

Barb's Crafty Kitty

Miss KrisP's Krafts