I fitted a polo GTI mirror, required some modification but it fitted.
Don't think lupo fits ast hey are the same fitment as the mk4 golf which i tried and doesn't work.
I ordered mine from the seat dealer and was about 88 for the main unit, the rest can be got from an arosa/lupo so things like the mirror and poss housing can be got from places like gsf a bit cheaper than the dealers or hit the scrappies and get dirty!
I'm gonna be different and say i'd like two drivers side mirrors.
I think the small ones are two small.
So the housing and the glass are the same size? does either the lupo or arosa have the blind spot sorted
Seen an arsoa with small mirror and blind spot on in never bothered to look into as i had already got the glass and wasn't going to spend another £25 on a new one, you soon get used to the smaller mirror.