Amazon has the Energizer Lithium Coin Battery – Pack of 6 in $5.22 with free shipping when you checkout via Subscribe & Save.
Product Features:
- Energizer 2032 Lithium Coin Battery.
- Long-lasting, great for heart-rate monitors, remotes, keyless entry systems, glucose monitors.
- toys, and games.
- Holds power for up to 10 years in storage.