Depending on the model, these various seals are located inside the vacuum pump and between the vacuum pump and the engine block.
BMW M47 M57 Vacuum pump seal repair kit - High-quality seals and gaskets
Vacuum pump seal repair kit A64623065 / 64623065 for Mercedes
Vacuum pump seal repair kit 9A111009002 for Porsche
Vacuum pump seal repair kit 057145100L for AUDI / Seat / Skoda / VW
Vacuum pump seal repair kit 057145100T for AUDI / Seat / Skoda / VW
Vacuum pump seal repair kit 94811005004 for Porsche
