Custom spring or just use a spacer?

Eibach and Hyper-Co make springs in 2 and 2 1/4 inch ID in lengths from 4 to 8 inches.  I sell them for $110 each.  But what do you do if the normal easy to get sizes don’t fit your shock?  I can have a custom spring made for $175 and two weeks.  Or I can cut one of my ready made $30 spacers to the length needed, polish it up and dazzle you.  This one is for a FZ-09.