A4 AC clutch

[Ed Kellock]

I worked on my boss' 2000 A4 Avant (250k+ miles) AC tonight and believe I
isolated the problem to the ac clutch, but apparently it is not available
separately. 
 
When it should have been running and wasn't, there was 12 volts to the
trigger wire.
 
With the engine off, I was able to rotate the ac compressor and it felt
smooth.  
 
I thought I could just replace the ac clutch, but that does not seem to be
the case.
 
If either my diagnosis is poor or anyone knows where I can get just the
clutch, please chime in.
 
The ac clutch part# according to ETKA is 8d0260811a
 
Thanks!
 
Ed