OldMiniBikes sold the fork springs in the past. I can't find them on there website right now. Seems like all there good Bonanza stuff went bye bye. They no longer sell the Bonanza Repop Jackshafts, Repop Bonanza Badges, Bendix Brakes and now it looks like the spring are gone too. I have a couple pairs of old sets I can dig through if you need me to. I should of bought more from OldMiniBikes when they were available.