I ordered it from this site:
http://www.bluraysforeveryone.com/
I've never dealt with them before, but they offered it a lot cheaper than the Ebay sellers willing to shipping to Europe.
Happy Birthday to Me was never one of my favourite slashers - perhaps because it lacks a thrilling final chase. But I'll gladly revisit it on blu.
When a Stranger Calls, however, is a must own. The opening sequence is iconic horror, and the overall structure of the movie is bold.