That is some beautiful material. The value beyond $8 - $10/bf for generic walnut around here would be specific to the material and your value of it....
As you have discovered, when you buy your cast iron router wing or table you have set the dimensions and corner radii of your usable plates or lifts....
Glenn, I had the wrong number. Correct model number is 113.29901.
This thread may help. Besides Grandpa's 1950 Emerson I had a 1970's "113." contractor. I added a decent fence, PALs, machined pulleys and a link belt. I also wrapped a 90# bag of Redi-crete in plastic and tossed it in the base for ballast.
I could get the blade very well aligned at 90 degrees but, as with nearly all contractor format saws, bevel cuts were a challenge.