get you some 3/8 inch tubeing an a flaring tool and make you some ...i dont know where to get them unless you try McMaster carr...good luck
regards
woody
Provided that the stanchions are otherwise in sound condition, I second Woodster's suggestion.
It's what I did seven years ago when I bought my 1980 Cherubini Hunter 36. The drilled holes through the stanchions had plastic inserts much like the protective washers one uses to route electrical wires through plate metal, like a car firewall. Over time these became brittle fell away.
Get the SS tubing. Cut to about 3/8" longer than the diameter of the stanchion. Insert into the existing Stanchion hole. Flare both sides of the SS tubing.