The current Mavic Open Pros are great rims IMO and, in silver, look "retro" enough for bikes that, as Marty says, are not show bikes but riders.

I've been riding them for awhile now and even when I topped out on the far side of 250# they held up great. They should be available in 36H which I imagine your hubs are and will build up into a wheelset you can ride w/o worrying about.

If you're really "in for a penny, in for a pound" go ahead and find another Campy rear hub that'll take a freewheel (front hubs haven't changed so you can go new there) and build a new clincher wheelset thereby keeping your original wheels, well, original.