get to know a lineman from the local power company. I work for the power company in my home town and we have a fiberglass extendo stick that is designed for working on powerlines from the growd . the ones I use will go up to 40' and I have got several of my own planes from trees. once, I had to stand on the toolbox of my truck to reach a plane in a tree. I got them all down so far and have learned to stay away from trees as much as possable. I am sure you can order one. this is like the one I use. but it may cost way more than you will want to pay for. I know that tree trimmers that work for the power company or privatly use simmerly tools you could get to know one of them fellas.

http://www.hfgp.com/images/catalog/A-2.gif