ebay... the tv tuner is useless in the US for tv reception, as we are all digital now but it gives you an AV input (mono, not stereo) and reverse camera integration. look for hybrid, analogue and digital, even though it still doesn't matter.

also, if you can source the parts 61 31 8 368 345and 61 31 8 368 346,

you will be able to utilize factory spots for the AV input...