Sorry but I don't. I had a spare that I sold to a fellow forum enthusiast about a month ago. It's difficult to do anyway since the RS6 comes with an immobilizer from the factory. In order for the immobilizer to remain functional, the second ECU would have to be programmed to your VIN. This can be done with a VAG-COM tool but only if you have the PIN # specific to your car. You might be able to get this from the dealer or I can get it from your original ECU. It's much easier to just send in your original ECU.