I just got my account approved and my first order placed at Ventos, a large supplier of aromachemicals and essential oils based in Spain. They have a large catalog (see web) and the quality of their essential oils ís generally OK.
As their minimum order is usually 1 Kg. per item, much more that what I really need, I will be ready to share my orders with group members. This could be interesting for EC residents, as there are no customs procedures nor import duties to pay.
If you are interested in any particular product, please let me know and maybe we can arrange a shared order in a couple of weeks.
Also, I am looking for an European supplier of high quality glass perfume bottles. Most firms ask for a large minimum order. Maybe it could be a good idea to plan a group buy for these too.