Stringbag, sure no I bought mine at local electronic supply e-shop, it was cost $0,5, but it was not so easy to find it.
Hmmm, you mean that this TCU need to be coded? Never heard about it, usualy coding required for the craddle installations, or when phone option is initially installed in the car, but probably you're right, please post the results as you finish it, I've subscribed for this thread, so I will wait.