Cant recommend any one in cornwall but can recommend a guy in exeter if thats anygood for you.
Fade 2 Grey and the mans name is Nigel Holland comes from cullompton. 07786065696
Did my rear windows in my multiwagon nearly 3 years ago and still looking good, Uses very good quality film and is well priced.
Exeter is 2 hours from me (115 miles), but it might be worth me travelling.
The place near Newquay answered my email earlier today - £220 +VAT for 5 windows.
Sounds a bit expensive to me.
Do you have an email or website address for the guy in Exeter?