Kits?
I'd seriously love to build one, but I'd need someone with the woodworking skills to help me. It really is such a neat project. Can't wait to see prints.
I had a Bender 4X5 kit, which was actually quite usable. The woodworking part is pretty much done when you get the kit, insofar as cutting pieces to size. You must do the sanding, gluing, attaching screws, etc. The nice thing about the Bender kit (and they have 8X10) is that building one of them may prime you for a scratch built camera. That's if you find out the woodworking is easier than you think it might be.
There have been some threads on APUG for Bender, so maybe a search.
Also, there is another precut kit that is more of a flatbed 4X5, but I can't think of the name right now.
Here is a link to Bender.
http://www.bender.com
Oh yes, found the other camera... a Bulldog 4X5. Not very pretty, but precut and you assemble. Here is an article on the Bulldog.
http://www.ephotozine.com/article/Bulldog-5x4-self-assembly-camera
And before I close, That Walnut camera from the OP is great... Very nice looking and looks like one of the dreadnaughts of LF cameras. I can hardly imagine contact printing something that I can just frame and hang right from the neg.