You can often procure magnet wire by unwinding lengths from the armature of a scrapped motor or solenoid.
If you are soldering your connections, you can just ignore the insulation and solder as if it were bare wire. The enamel will simply vaporize as you solder.
I use short lengths of it to make unobtrusive connections to track switches. Even in this high-current application it works fine as long as you switch to larger wire as soon as possible.
