Hi jackalone72
Slaters make it in UK and its available from Hannants.
And Squadron have it too.
Plus as Paul said it should be available at most good model/hobby shops.
Once you know what it is, you could find similar material used in packaging....one post from Merlin I think mentioned it was used in a smoked salmon pack. And I've seen it used in the packs for shirts.
Cheers
Peter