I can't vouch for the European site, but I've bought from Heilyser in Canada: http://www.members.shaw.ca/orioleln/
Didn't do it on the basis of his website, which admittedly needs work. That website cracks me up, since it is the complete opposite of Heinz, the owner.
Heinz is a member of our local club in Victoria, BC and I know him from there. He is very knowledgeable and helpful at the club. He makes incredibly perfect gear. I really like the vapourizer I got from him and I drove out to pick it up so got a tour of his beeyard and his workshop... both totally clean and organized and neat. He's like the perfect German stereotype. I hope to be reincarnated as him.
As you can tell, I like him and would be happy to buy from him any time.
I hope this message isn't against the rules about selling on the forums but I don't stand to make anything from it, so I'd guess it's OK.