The fastest way to obtain a replacement key for the down-tube battery platform is through a completely new lock assembly. We can provide the battery interface part that can be swapped out. In this case, your bike will be working again, but will use a different key. The part you will need to purchase and replace can be found here: https://shop.juicedbikes.com/collections/parts/products/downtube-battery-lock-interface-set-for-current-series-e-bikes
To change the lock interface, follow these instructions.