Google has slowly been adding replacement charging docks for the Android Wear devices to the Play Store. That's important in the case of watches like the Gear Live, which uses a special clip to charge the watch. It's less of an issue for the Qi-equipped Moto 360, but the official stand is in stock now anyway.
The listing for the dock appeared recently, but it wasn't available for purchase. That's changed now, and you can order it for $39.99.