It’s a kit. If you search you will find it immediately. I ordered it from ebay.
Compressor is (factory) new.
I didn’t change f/r leveling valve solenoids and even put the old valve block back. I almost ordered new for rear.. Gap tool helped me out with lives values and pointed to right direction.
New compressor raised the car and filled the air tank with minutes.

Googs....Chance are the old compressor had to work too hard and wore out the new piston seal, don't know how many times you can rebuild them but the overhaul kits work great on the few I have done...

322BLL...All that you have replaced now should make it great for years to come...  Pete

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2014 L405 Autobiography SDV8 4.4 Loire Blue Ebony interior
2011 L322 Vogue SE 4.4 TDV8 Baltic Blue. Parchment over Navy Interior. Sold
2012 L322 Autobiography 5.0 Supercharged Ipanema Sand, Jet Interior. Sold
2002 L322 Vogue 4.4 V8 Epson Green, Ivory over Aspen Interior (Fatty Offroader) Sold
-Click for Project Fatty off roader-

Thx Pete, I’m gunna get a kit from eBay any give it a go after all we are not paying sheep stations for em!

Good idea to start with kit(would do the same before buying new compressor) since much cheaper and might be all you need. From what I found I believe a compressor is good for 200-250k km. Can’t keep changing only the piston ring forever