Yes. "Ross" is a steering gear maker, just like Saginaw. These early J-series used one of two Ross designs, both shown in the '62-73 J-series parts book, free to read and download on the Tom COllins site. Illustration, Gr 11 - L 4 (group 11, plate 4). One type (like shown for the Jeep in your link) is the cam-and-lever type. The second is the worm-and-gear type, which looks like the newer version (not present in my older Motors manual). If you have not downloaded the parts book, you should - to me, it's the essential resource for your Wagoneer, and will tell you so much more than other obliquely related online listings.
Suggest you compare those drawings to what you have. If it's a cam-and-lever type, that's like the little Jeeps shown on the site you linked and you may be able to share some refurb tech, if not parts directly. If it's the worm-and-gear type, you'll need to be more resourceful.
In that case, I would look for a '60-ish Motors manual for either or both cars and light trucks, and see what overlaps with your Jeep. In earlier years, both Studebaker and Willys (and Crosley!) used the Ross steering in their cars. Possible some of your parts are shared with say, the Willys FCs, or Studebaker cars and light trucks? A Motors manual from the early '60s would show you that.
From you pictures, it looks like you have a bell crank, similar to the one in the link you shared. I don't see an illustration of this in the parts book unfortunately, but the components will be listed in the listings part of the book. You could either leaf through group 11, or you might find something using the alphabetic index. Not always easy, since you have to know or guess what name Jeep gives the part.