Does anyone have one for sale or know where the most reputable place to buy an air controller would be

 

I bought mine used from https://www.croooober.com/en/
Price was something about 250-300€

 

They come up on ebay from time to time it's where I got mine. Be careful that the harness you get is for you generation car UCF30 or UCF31.

 

There is no harnes for UCF30 because that model has no air suspension at all.

UCF30 Without airsuspension
UCF31 With airsuspension

The year model is the one that matters
2000/9 - 2003/7 model you select harness H-087D
2003/8 -> you select harness H-087E

 

My mistake I thought UCF30 was 2000 to 2003 and UCF31 was 2004 to 2006.