I messaged play-keyboard on Messenger and they said it's too long since my buy (which was over a year ago, first international round) to get a free replacement. As I didn't feel like arguing I just said I want to buy the PCB, which I did together with the brass plate. The PCB works fine for like 2 weeks now. The only issue I have is with the plate - original brass plate I got during the GB was quite tight (very hard to get Kailh Box Blacks in, and especially out), the new one is quite loose (so in turn Gateron Inks - and several other Gateron switch types I own - did not keep in place). So in the end, I had to desolder old plate (which I wanted to avoid, which was the reason I bought a new plate in the first place) and now Kailh Box Blacks fit nicely in the new plate and Gateron Inks fit just as nicely in the old one.