I did a quick search and found a couple places where you can buy chocolate chips online. One of them has the genuine Nestle Toll House chips, in case you REALLY want to be authentic. :-) It's at:http://www.mybrandsinc.com/ShopOnline/Catalog...
They're based in the US, but they said they will ship to international addresses - just call and they can give you the details about shipping method and cost and everything. If you click on the "Policies" link at the top of the page, they give you a phone number, or you could try e-mailing to email@example.com. It might be a good source for other hard-to-find foods from home.
A second place is a website that sells in bulk, www.bulkfoods.com. They apparently sell a lot to stores, so don't let shipping rates for quantities such as "1,000 lbs." (!) scare you off, they ship in quantities as small as 1 pound, apparently. They ship international orders via U.S.P.S. But they're not any specific brand, so you might not get chocolate chips as good as good as you're used to. I don't know, I've never ordered from them.
Of course, buying things like that and having them shipped overseas would probably be pretty expensive, but maybe it would be nice for a special treat...or you could share an order and split shipping with other homesick friends. Or hey, maybe friends or family that live at home could buy the non-perishable items you're craving and mail them over.
In terms of the cookies themselves, I've heard that butter alone makes cookies crunchy or crispy, vegetable shortening makes them softer and chewier. My good, old, tried-and-true Betty Crocker recipe uses half of each and that gives cookies that are bit crispy on the edges and soft and chewy in the middle, and without losing that buttery taste. Mmmmmm....I think it's time for lunch...:-)
Also, I bake all my cookies now on those Silpat baking mats. They're silicone with glass fiber or something woven into them. At any rate, nothing sticks to them, the cookies never burn or get too dark on the bottom, and they're reusable so you don't have to keep buying and throwing away parchment paper or scrubbing baking sheets.
Now I think I'll have to bake some cookies this weekend...