Speaker Covers for Magnepan 2.7qrs.

Hi im currently restoring a set of magnepan 2.7qr's I picked up and I'm looking to replace the speaker covers as I dont think the old ones will survive when I pull them off to stick the coil wires down-I'm in Australia and there is only one distributer for magnepan in the whole country and his prices are ridiculous for speaker cloth. Has anyone used any non genuine material or know of a good alternative to the original Magnepan material (I dont even know if the new stuff they supply will be the same anyway with the speakers being 20 years old.)