Steven,
Took me awhile to find it! It came from Swiger Coil Systems Inc. They are on the Web at swigercoil.com . The gentleman I spoke with was Bruce Gall He was very helpfull. It wasn't cheap $14.00 a Lb. I bought 10 Lbs.
MWS wire & Essex Browwnell carry it as well but They only wan't to sell 250 Lbs. at a time!
Swiger Coil also custom winds all kinds of coils including coils for wind turbines! Once I get the first stator completed I may send them the specs on the finish product & have them give me a quote on winding the complete Stator for future mills.
I have really enjoyed learning the process of winding coils for my own stator & thanks to help from Flux & others I can now do it but that doesn't mean that is where my time is best spent!
Brian Clark