I've found magnet wire at flea markets. You might try searching for it on the internet. AES, tubesandmore.com , does sell magnet wire but the price may not be decent. They have 21, 22, 24, 26, 32 and 36 gauge in their catalog.
Norm
: I have decided to try and rewind a field coil on an old Philco speaker. Does anyone know where to buy magnet wire (at various gauges) at a decent price? Thanks