Certainly not all! While I don't have the undying patience necessary to wade through Gwern's entire list of modafinil suppliers[1], it does seem statistically likely that at least one of those is semi-reputable[2] and ships to countries beyond the US. Whether any of them ship to your country is a lower — but still probably finite — probability depending your country's chemical restrictions.

[1] http://www.gwern.net/Modafinil#suppliers-prices

[2] See /r/nootropics or LongeCity for reviews.