Bareroots, you may post your question in the Treebuzz and see what the "Profesional Tree Workers" advise.
Just another couple of ideas.
You can also contact the guys with this group in England;
http://www.mighty-oak.co.uk/contact.phpA third option Paolo with Tree Climbing
Italy is a good Profesional Tree Climber and very involved in European activities.
http://www.treeclimbing.it/Good luck