Hi peeps

i bought me a3 back in oct last year and only now got funds to make it my own as of such.
its a sliver 02 1.9 tdi.
i'm thinking about rs6 or q7 style wheels not sure so any thoughts would great and also i'm liking the r8 style headlights but i cant find any for my year can anyone help?
and the last thing that i can think of at the mo does anyone know where to find the senor for the temp outside and how much it will cost?the reason i ask is coz i think its suppose to tell me but it doesnt and its messing up my air con