+same here - never been cold, but never slept in the snow and after four years "touch wood" have not holed it sleeping under a fly
Maybe Have a look on the campsaver or a Canadian sport shop web site as I think the next generation thermarests come with some new rapid filling valve.
A mate used this web site and shipped his thermarest xlite to Nz via that Nzpost freight forward service for around $200 NZd
Cheers
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