Well the front wheel is easy; any number of online sites will build a wheel to your specifcations. Using a custom wheel form on sites like excelsports.com, bikeman.com, or Coloradocyclist.com, you pick the rim, spokes and hub you want, theybuild the wheel. Get alu hubs and rims, stainless spokes and alloy nipples and make sure the internal steel ball bearing stay greasy, and rust should not be a problem.

I would think, however, you will have tough time finding a new 126mm 6 /7 speed freewheel-type hub (or5 /6 speed if the bike is 120mm spaced rather than 126). You could have a shop build a new rim and spokes onto the existing hub but I am not sure thats would be worth the cash.

Alternatively, you could buy these: http://cgi.ebay.com/Dura-Ace-Matrix-...item1c14750926

Edited to add: Oops, failed to notice above ebay item has uniglide cassette; all kinds of funky there so probably best to look elsewhere.