I think you both are pretty much saying the same thing. Doug will change the flavor of w-, p-, and t-mods of the units he has sold, or will do an upgrade to a digi-mod he has sold. But he isn't selling new ones (out of production) or modding existing units he did not sell.
At any rate, I doubt Doug will provide any info on the exact parts he used for these mods, since those parts may well be used on mod 410s or mod FR2's or whatever he's got up his sleeve. Time permitting, I might look into mods to the UA5 myself, but not at this point.