I built stators out of aluminum window screening and plastic fluorescent light cover. I bonded the screen to the plastic by laying the screen where i wanted it, pressing a hot soldering iron at every junction of the plastic. This forces one or two strands in to the plastic which provides a very strong bond. I believe the screen makes a good material because of its very small hole size, and high number of wires. This shoudl yield a very uniform field strength. Also these materials are low cost and readily available.