Gaskets - Air Compressor + Dryer

Hello, everybody.
I have to change the air compressor (is leaking) and the dryer at my thickness (A8, 3.7 Quattro, 169kw/230PS, Ez.9/97). I already have new parts. However, there are no seals for the connections of the lines to the dryer and the lines to the compressor.
Can someone help me if there are any seals there and if so, what these seals are?

Thank you very much
Jochen Kr.