I am going to take a whack at building them myself. I figured that for all the time and effort that would potentially go into these wheels, that when I finished I would have a strong, high quality, long-lasting wheel set (DT Swiss rims and Shimano 600 Tricolor hubs). At my age these might be the last wheels I ever need for myself.
I also have a master wheelbuilder not too far from where I live who can back me up if I get in a bind. I expect that I won't have too much trouble with the front wheel, its the real wheel, and the differential spoke tension/dishing that might give me some trouble.