Take a look at Wheelbuilder.com
There also a guy in Grandbury, TX. He's pretty much nationally known, but I can't think of his we site off hand. I'll try and find it tonight at work.
Both will use your existing hubs.
I'm sort of stuck on the same deal. I have a set of Chorus hub and a set of Mavic rims that are not Deep V, but found a great deal on some Vuelta Italia Corso Deep V's for rims. Now to talk myself into learning to build. I'm lucky that I have a couple of folks local who can help/teach me though.