Coin Cell on off Battery Holder CR2032 Battery Mount Module arduino DIY A17 758176788665 | eBay
5 Ways to Make a Paper Battery Holder | Chibitronics
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
Three DIY Battery Holders – For those low power projects | Four-Three-Oh!
5X DIY CR2032 3V Button Coin Cell Battery Holder Case Box With On-Off Switch BAY | eBay