Been getting parts from JD to keep it going but really expensive and some are on their last leg. They are C shank style with tall skinny springs. Have knock on shovels 9 inch. Is there an aftermarket option? Can I run a Danish tine set up with a 9 inch sweep if they are tall enough? Most Danish tine cultivator set ups around here have smaller sweeps and more shanks to make up for it. TIA.