I'm refurbishing the frame on a Duetto before I get a new top installed. I noticed that all the hinge points have a lot of slop. Looks like there should be a bushing insert but nothing, not a single one has even a remnant of plastic, nylon or plastic insert. Is this correct? If so, no problem, but if bushing needed are they available or do I head to Lowes/Hone Depot and fab up some? None of the Alfa parts sites list anything.