I had a blower fan go replaced under warranty, I read on here others had the same issue. I haven't heard of the AC compressor going out though.

The dealer can check the entire country inventory (USA). If no one has it, it's probably coming form Germany and can take a while +1month.

Earlier this year I had my center arm rest replaced. It took +1month for the part to arrive from Germany.

1.) The dealer can check other local dealers
2.) They can check the local distribution center. I think there's something like 5 or 8 or something like that in the country (USA).
3.) If its not located anywhere, it's coming from Deutschland