I’m looking for the thin boxes that are anywhere from 4×6″ to 9×12″. Plenty of places offer the pill box variety. They’re the kind that you often see mints being sold in. Even more places have the round tins with lid variety.
I found one place, Dunwoodywoodybooth.com, that has what I’m looking for. They sell a pack of twelve 9 x 12 x .5″ tins for $44.50 ($3.70 each). And they sell a pack of ten 9-5/8″ x 4-5/8″ x 1/2″ for $18.95 ($1.90 each). Those prices seem a bit steep.