One of the problems that you might have in attracting a trained tree surgeon to do this job for free is just how expensive it is to be one. I'm a trained tree surgeon and to be fully qualified to dismantle a tree you will probably have need to have at least a couple of years of experience, all the kit (climbing gear x 2, tree saw, ground saw, method of disposing of tree waste), completed all the courses (quick estimate - £5000) and have the necessary insurance which will be invalid unless you have a second qualified climber with you.
It's quite a risk for someone to take on. That said, and being the kind of altruistic chap that I am, If I was closer I would at least have a look for you. Good luck, but don't be surprised if no-one comes forward to take it on.
Jack