you might try...
I believe Arctic Runner is an oft-used material among some of our Scandinavian angling and tying brethren.
You might try contacting Lars Terkildsen via 'FiskeShopen Morrum'. The site's address is www.fiskeshopen.com - and I believe you can reach Lars at email@example.com.
Another source is 'The Angling Club Lax-A' in Iceland. The club's Camp Manager is Skuli Kristinsson, who dresses some of the most exqusite hair-wing and tube flies you'd ever want to see. Their website is at; www.lax-a.is
Hope the info helps.