I have been running one person 'Parenthesis' retreats here in Spain for a couple of years now. This year, working with Hilary Gallo we are adding a new, small group format. We are going to be running the first one as a kind of beta-test at the end of June this year.
If you are interested in participating let me know (we convene a session once there is a quorum).
If you would like more information, here is the brochure.