Finding VW 504/507 was a challenge.

[930.engineering]

.
ECS prices are fairly acceptable:

OE VW

Bosch

Valeo

rear

Pretty sure these can be found cheaper somewhere else.
.

 

[KCJeep]

FCP Euro is price competitive on kits as well.

 

[DuckRyder]

ECS charges more for VW oil than the dealer.

 

[BLND1]

ECS charges more for VW oil than the dealer.

Depends on the dealer. Mine charges $12 per quart.