I buy my vanilla from Madavanilla. They grow their owen means on Madagascar and sell them directly.
Do you speak German? It is a German website but they do ship internationally and you can pay by paypal.
I always buy the "Bruchvanille" which are just less pretty vanilla beans and the prices are more than fair (100g for 9,50€ and 250g for 23€). This is the link to the Bruchvanille in the shop
They have some organic certified products but I'm not sure if everything they sell is organic.
If you need help with navigating the website I'm happy to help.