Hi,
check your local motor market weekly if you have one,you know the free car mags you get at petrol staion forecourts,there should be local window tinting advertised in those.There were 4 or 5 different tinting businesses in our local mag (central Scotland).
I've just had my Disco done professionally ,all 5 doors for £190. Front 2 are as dark as I can go legally with the rest just a shade darker,
Cheers...........Kertir.