12mm Coin Cell Breakout Board : ID 1868 : $1.95 : Adafruit Industries, Unique & fun DIY electronics and kits
Amazon.com: IIVVERR 20 PCS Plastic Coin Button Cell Battery Holder Socket Case for CR1220 (20 PCS de plástico botón de la moneda de la pila de la caja del zócalo del sostenedor
Battery Holder for CR1220 - Metal PCB Mount [6498] : Sunrom Electronics
SMD SMT Button Coin Cell Battery Holder CR1220 High Temp Resistance Pack of 20 | eBay
100pcs CR1225 Battery Holder SMT CR1220 CR1216 Button Cell Case Battery Socket Connector Surface Mount PCB Solder - AliExpress