Helly Hansen is still around, but Spesialprodukter has been renamed. Google found the way and if you follow the lead (Norwegian language most of the way) you end up here:
The hyperlink "Velg farge" means select colour and "Send førspørgsel" means Send request.
Keep in mind that Norway is not EU, so if you have it sent over it will cost import fees, VAT etc.
We ordered a new canopy for our Skagerrak 720 form this company. Very pleasant and excellent service. They have the original size /shape. Fantastic quality at moderate prices (compared to buying in the Netherlands). They will send it exclusive of VAT so you will have to pay the VAT in the country you live in.
Last year in November they offered a 25% discount. Maybe they will do this again this year?