i think this one is likely okay, I found a roll pin that will fit snug in the cam dowel slot, gonna locktite it in and then bolt everything back up. see what happens
You need a 3/16 X 3/4 Woodruff key... Here's what you need... I bought the last few from Ace once and kept the box so I could have the part number and description for if I needed any more in the future...
Just go to Ace Hardware and ask them for this one: