Aside from the excellent rims available from Noah Stutzman as mentioned by Brant above, new wood rims are also available from 'Cerchio Ghisallo' and 'CB italia' in Italy. The clincher style ones (for conventional type tyres) from 'CG' also come with a carbon fibre liner that allows modern high pressure tyres to be fitted.
The 'CB Italia' rims are only available in the sprint style, for 'tubular' (singletube) tyres.
If you were to go down the English style steel wheels route and wanted to build (or have built) a new set I would source rims from The Netherlands, here's a link to an excellent source.....
Order the Cordo Rodi Westwood Rim 28 x 1/2" 36H SP13 - Black
hollandbikeshop.com
The Westwood style rims from "Cordo" are fantastic quality.
They are available in 700c (modern 28" or 622mm) and 700B (traditional English 28", slightly larger at 635mm). They are also available in aluminium ( powder coated black) and are therefore much lighter and roll/accelerate very well.
These rims are available in 32 hole front and 40 hole rear drillings, or crucially for you guys across the pond in 36 hole drillings.
I use these rims myself and they have not required re-truing in the 5 years since I built them up; unlike all of my antique wood rims (tubular type) which are very sensitive to changes in air temperature and atmospheric humidity and require regular fettling in the frequently damp British climate!
I guess that's not a problem for you
@New Mexico Brant, lol.