retrofitting my audi 90 Q89 2,3 20v 123kw to S2

I’m not a professional but I know myself well with my audio and that around it but I’ve never dealt with the topic S2 conversion. can you tell me what and how to earn an S2 emblem on the cooler grill in the front, what you can do and the costs for it stay in the frame because I know that there are no limits up. With friendly greeting Flo20V