We're going with this lot, mentioned above,
http://www.lemansrace.com/dpage.html?pageid=92. Their organisation seems spot on, their staff helpful and knowledgeable and the packages, whilst somewhat expensive, have a lot going for them. We chose to take this route for 'medical' reasons too, following injuries, as it takes some/most/all of the worry out knowing there is a semi-peaceful haven and support, if required, to hand. We are at the Chateau d'Eporce, may see you there!