Oh, there are a rather large and growing number of online vet stores that carry Fasinex or other triclabendazole containing substances, at least in Europe. Since I only speak my mother tounge and English I could not tell you of e.g. French or Spanish shops, but I have found a number of UK ones. I would suggest you Google using the input:
fasinex site:.uk
Whether they would ship outside of EU or alike, I however am unable to tell you.