Lots of suppliers sell these kits so buy a copy of a recent VW mag and start browsing, One word of warning is that a lot of the cheaper kits are made for left hand drive cars so the beam pattern will point to the offside of the road which is slightly against the law.
A decent kit will be euro marked on it to say that it has passed testing and will therefore have an E1 marked on the glass, If it doesn't have this and the beam is out you wont pass an MOT.
