Don't! I received the response from Joachim some time ago.
Perhaps I forgot to post about it here. To make a long
story short, Jochim doesn't seem to have a lot of exciting
stuff available right now. He may have some interesting
Nepenthes next year. In his note to me he said he does
grow plants in vitro, but he couldn't sell them. I don't
know why he couldn't sell them, perhaps he meant that they
weren't of a sellable size yet and something was lost in
the translation.
So, Joachim is out of the running for this year.