1H6 955 651 - washer pump - 27.86
Looking at that part number it might be a MK3 item, which has a different plug on it. ETOS notes you also need:
357 972 752 - flat contact housing - 3.95
357 972 741 A - single wiring seal - 0.39 x2
which seems to support that assumption. GSF will probably be able to sort you out with one, see if they have ones with the non-return valve in! You can tell it has by looking at the output pipes, the nr valve is a big round blobby bit on there...