Kit

Not very informative site. They look the part but it does
not actually say they are winter gloves, does it?
Prices on that site seems to be in Swedish kronor, so
I guess around GBP 70.

I googled for Swedish shops selling snowmobile mittens
and it is hard to find anything at all.

 

As per another post these may get you by,
http://shurl.net/ln

These can only be re-heated by a direct source e.g you cannot use
a,"Microwave" to re-heat.