Are there any light weight comfortable ankle foot orthosis's for charcot marie tooth disease besides the full hard plastic leg ones I have?

Yes. Their are braces these days made of carbon fiber which is very strong and very light weight. They use it to build jet fighters and racing cars amongst other things. Ask your PT if he/she can build your next orthotic brace out of it and if he can't get a hold of it use the net. Maybe Nike can help you. They are in Oregon and are involved in footwear. Might be great marketing opportunity for them!