Yes, on the parts online plug in B and look for plow bottoms... the whole list of Syracuse Bottoms is there. Find yours from the pics. Type in "Plow Bottoms" and the list will show up for your other plows.
I think my dad did away with the shin piece on his Syracuse bottoms. He would take two worn moldboards and make a "new" one. Also rebuilt the shares with a new point tip from JD and a "new" cutting edge cut from an old point. I have two points that he rebuilt and several of the new Syracuse repair tips, along with a dozen worn points, some with the cutting edge cut out that he used to repair the rebuilt ones I have now. Sounds like a lot of work, but that's what they did back then. Fortunately, I learned how to weld from him.