On the dealership, tell them to pull their head in...Go to Repco, Autopro, or Autobahn.
That plug(BKUR6ET) is what is recommended for the VW 1.8T engine in the NGK catalogue. PFR6Q is probably another brands part number.
Beru's part number is 14FGH-DTUR.
Denso's part number is K20PBR.
Torch's part number is K6TJC.