Think I may have found it!

Says it's for my Model:

VW GOLF VII (5G1, BQ1, BE1, BE2) 1.4 TSI 90KW/122HP [Nov '12 - Mar '17]

2399-002-PCS2 - OIL CASING DRAIN PLUG PCS2 (N10037105) Auto Parts Online

Well priced and in AU stock.

Now to change the gearbox oil!