They stopped production, but due to popular demand, they have started it back up! [1]
The open source remote control system is called OVMS [2]. I have not got around to order and install it yet, but my ambition is to get it done this summer. They have detailed instructions on their site [3].
Unfortunately Volkswagen stopped making them, and the new ID line embodies many negatives of new cars.
Any details about the open source replacement for controls?