There are a few products, a few crafty individuals have made them, but I don’t think any longer because of the V1 change. You can probably hit up @jedgar for the plans he created for thisV1 lock - jedgar Send him cookies along with your thanks.
I was an early adopter of the Truckparts lock. It’s pretty sneaky and slick, but - your keychain will get in the way and can be a pain during inclement weather. Great device though.