Do you need another spring because an eye broke off the end?
You can thread a bit of aluminium (or any other metal) to screw into the inside of the broken end of the spring.? It has a diameter and pitch you can measure.? Use a round-nose lathe bit same diameter as the spring, not a vee-bit.? If you choose a pitch the same or a wee bit bigger it will thread in nicely.? Loctite to hold it in place if it? turns out a bit loose, otherwise it will probably be impossible to remove.? Tap the end M6 and thread&Loctite? in the tensioning adjustment rod.? Cut off the hook on the tensioning adjustment rod (or use a bit of allthread) and your done - jv?