Img-electromark.com
Email pbruno at img-electromark.com Patricia will hook you up! I've delt with them several times. They make a good product, fairly cheaply and once they have your stencil on file, they can send you new ones by post any time you need it.
There are lots of supply houses here in the US, that deal over the internet. While some won't ship overseas some will, and if you just jump online you can have things delivered to wherever your partner will be staying.
My personal favorites are:
Alpha knife supply
www.alphaknifesupply.com
Jantz
Find all your quality knife making supplies from Damascus steel for blades, handle materials, tools and more. Jantz also has knife making kits available with a low price guarantee.
knifemaking.com
Texas knifemakers supply
Knife kits
www. Knifekits.com
There are a whole bunch of them that sell general stuff, and as far as I know EVERYONE uses each place for one or two items that no one else carries.
Oh pops knife supply is very well regarded, though I've never bought anything from them...
Providing quality knife making supplies at the best prices since 1980. Shop now for the best knife supplies like unique handle materials, belts, abrasives, steel, fitting tools, buffing tools, and more. Owned and operated by 4 professional knife makers to assist with all your knife supply...
popsknife.supplies
What else are you looking for?
Oh on the topic of stencils, if you are gentle with them they can last for years. Use short cycles, (avoiding heat) then wash them off when done, and keep them in a cool, dry, dark place.
If you need a deeper etch, just do more cycles instead of longer ones. Use as little electrolyte as you can get away with.
Heat and light are the natural preditors of stencils, so keep them cool and only take them out when you need them!