It's not too hard once you get the hang of it. Netcraft includes what they call a wire mandrel which is how you make them.

Another box of stuff



What Netcraft calls it's wire mandrel, this is used to make the coils




Wrappping the wire



Finished coil, cut off what you need and save the rest for another time



Another cool thing you can make once you learn it is crappie spreadder frames, it's way cheaper to make them than buy them

Fatman