No one local to me that I know of. I can understand the importance of correct lacing positioning of the spokes in relation to the hub is crucial and that tension/truing the wheel takes skill and experience. Information on correct spoke place placement for Rohloff is widely available. Considering lacing the rim to the hub myself then take the wheel to a local experienced wheel builder to complete final tension and truing?
Yes, there's no reason why a competent wheel builder, following the instructions, won't make a good job of it.
However, Thorn's wheelbuilding is different from what is in the Rohloff manual, there's a post from them on here stressing that everything they do is with Rohloff's consent, but you may find another wheelbuilder reluctant to go down that route. Which is better I wouldn't know, Thorn haven't said why they decided to build like that, they don't need too, they stand behind what they do and offer far better warranty terms than anyone else.
It did leave me with a dilemma when I bought another hub recently, I would have much preferred Thorn to build it, but it wasn't an option. So my choice was the follow the manual or copy the wheel I have from Thorn. I did the latter, but it isn't without risk!