If there's a version on disc, it's probably available in Europe.
I checked Amazon and they have a copy... for $35. The cover has a PEGI rating and the "PC CD-ROM" logo at the top that I've seen in UK/Euro games over the past few years.
Funny thing, though? The Ubisoft website for Fatal Conspiracy HAS a picture of the US PC version! Maybe you can buy a hard copy at their webstore. I tried checking but apparently they think Mexico is part of Europe and they want me to pay in Euros.