What are the existing rims? If they aren't ruined, I'd probably stick with them. They are closer to original than anything you can get today, the have a connection to this bicycle, and you already have them. Rebuilt with news spokes and new tires on the same hubs, cleaned up ad polished, you'll have a very nice set of wheels.
I would like to echo this advice.I say this because the seller had some other wheel and rim auctions from the same estate sale going while this bike was running and there was a lot of nice stuff. I saw a few sets of wood filled rims and some early Fiamme red labels. If what you have is anything like that I would try to save them, they are really hard to find. I won a set of wood filled Scheerens laced to unknown hubs from the guy.
I do really want to build a set of wood rims for one of my bikes someday though, period correct or not.