Apparently tilt-a-way joints are rare and costly, but I learned last night that the rubber disc in Dorman “Help” part no 31000 rebuild kit for 90’s Crown Vic works nicely on a 68. $8.95 at O’Reilly’s. Just drill out the stock rivets and use 5/16 x 1.25 bolts and lock nuts to reassemble the joint (unless you have access to a big-ass rivet tool).
Yep, Dorman rebuild disc is what I used on my ‘69 tilt away as well. I don’t remember the exact part number though. 7 years and still going strong.