I was lucky enough to find an N.O.S. repair kit several years ago. I doubt anyone is reproducing these parts new. Attached is a technical service bulletin that has part numbers for the first and second style repair kits. If you can’t find the N.O.S. parts you may have to get a used driveshaft from a salvage yard and scavenge the parts. Maybe somebody else on here has had better luck sourcing these hard to find parts.