If you tired to make a microcontroller yourself, it would be huge. Anyway, your best bet would be to try
eBay. A lot of people there are willing to ship worldwide, and the prices usually aren't that bad. For example, look at
this listing.
Of course, this does have its share of problems. 1st, theres always the chance that the microcontrollers won't work. 2nd, if you don't have a credit/debit card, your pretty much out of luck.