how common are they on sierras? I think someone told me that the front windscreen on my car is the same as the sierra one.

ideally i'd want a heated one so it covers the demister thing.

how easily can i find one?

Ring Autoglass for a new one... but your looking at £3-400.

Saw someone on google talking about pilkington glass, don't know if you can buy direct and fit yourself!?

Only Mk2 sierras had the option/spec of a heated screen. Mk1 & Mk2 screens are a different shape (the bottom corners)

i think it must be the mk2 screen. someone was telling me the trucks used a sierra screen, and many had heated ones.
maybe i'll leave it out for iva