Apart from using formers there is another way of making springs (there usually is).

To do it you need three rollers, Two are the feed rollers which feed the wire/bar. The third roller forms the coil. This is done by the position of the third roller to the bar being fed. If the third roller is just touching the fed bar no coil will form. If the third roller is raised a coil will form just as in a set of ‘slip rolls’. The radius of the coil is determined by position of the third roller If the axle of the third roller is angled to the axle of the feed rollers spirals can now be rolled. The angel of the third roller with respect to the feed rollers determined the pitch of the spiral being formed. 

By controlling the radius of the coil and its pitch and changing them ‘in flight’ you can make almost any spring you like.

You can also heat the feed rod.

Bogs – That isa good idea if you only have a few to make.