These guys sell soy and hemp milk making devices. They are designed for euro electricity so if you are in the western hemisphere you'll need some sort of convertor. They said they sell live (unsterilized) seeds to the UK at least. I know there are other european countries where unsterilized hemp seeds are legal but I did not inquire about those. I have a small supply of live hemp seed thanks to an anonyous hemp farmer here in canada and I have been making live sprouted hemp milk since 1999. It's a great energy boost full of highly digestible essential fatty acids and amino acids and other goodies. There's some figures here: http://www.hanfmilch.at/f-inhalt.htm
You can make it with a regular blender and some sort of sieve or cheesecloth, no need for the special machine, but I'd imagine the machine makes it that much easier. I'll post some pics and a demo when I get a chance.