In reply to purplemonkeyelephant:
It's pretty muhch as you wrote... but I'd actually just write an email to OeAV:s insurance provider and verify... after all most normal insurances cover Finland & Sweden (even above the Artic Circle) and same applies for mainland Norway (Spittsbergen might be off limits).
http://www.alpenverein.at/portal_wAssets/docs/service/versicherung/2018_AV-...
Also, unlike climbing the kind of "winter hiking" you're doing is not considered an extreme sport and even regular insurance will cover it (don't use the term ski-touring, as it will get mixed up with the ski-touring/mountaineering one does in the alps).
So, you could also look for "regular" holiday insurances.