Have you checked out icebike.com

Gortex is OK but over-rated. You can get clammy even in cold conditions.
In the UK, there are 2 widely used alternatives to Goretex-type waterproofs for Scottish winter conditions:

http://www.paramo.co.uk/UK/index.html
and
http://www.buffalosystems.co.uk/

Norway may have its own local solutions.