2 x CR2032 Coin Cell Battery Box w/ On-Off Switch & Plain Wires : ID 4988 : $1.50 : Adafruit Industries, Unique & fun DIY electronics and kits
Lilypad Arduino - Coin Cell CR2032 Battery Holder with Switch - Save Batteries, Switch Off LEDs! - Walmart.com
LAMPVPATH (Pack of 6) cr2032 Battery Holder Coin Cell Holder, CR2032 Battery Holder with Switch, 2 x 3V CR2032 Button Coin Cell Battery Holder with Leads On Off Switch
CR2032 Battery Holder – Single Cell~4-pcs/pack. – HandsOn Tech