Found this on eBay when searching for the part number that MIJ suggested - 1K0858071E
if you look at the third picture along, it shows the part number stated above, but also the part number
1K0 858 069 G, although the revision letter, G, seems to be upside down!
Using an online EKTA, i found this, with the colour digits 1QA. However, I'm unsure if this part number is what I'm after though!