You can go with the following: http://www.solarcomposites.com/compo...itespools.html. You could also use Kevlar which is basically used by every other motor manufacturer that wraps their magnets (Neu is the only one who uses carbon fiber). You can also buy the C50 rotor which comes with the magnet wrapped with Kevlar.
You can use http://www.solarcomposites.com/compo...20sleeves.html and their Shrink Tube to make a nice Carbon/Kevlar wrapping. They come in different diameters and the link above even tell you the temps the epoxies can handle.