Wheel confusion

Hi all, I’m looking for winter tires and rims for my thickness (GP3, V6 FSI, long). According to vehicle license should be on it: 235/50 R18 101Y Currently the following summer tires are on it: 235/55 R17 99Y I suspect that are original VW rims. However, I don’t find these. Plan is, VW rims from the bay and tires fresh from the dealer. A thread with similar question is – but refers only to GP1&2