I get it from: http://www.thejamushop.com
because postage to the UK is cheapest from there.
Also if you are in the UK the cold cream you get here may not have the magic- mite killing ingredient (sodium-borate i think)in it as ponds recently changed the ingredients.
Not sure about the US.... Some people say the cold cream suffocates them though. If thats true then i spose it will work fine. I would use sea-buckthorn oil until you can get some zz cream if i were you.