Finally after a couple of days of trying we were able to get our roman tub filler in (literally in, not hooked up). Don't make the same mistake we made if you're ever installing an under mount tub. Check out the length of your faucet (the valve stem for plumbing aficionados) to ensure it'll clear the entire tub deck (taking into account the thickness of plywood, backer board, thin set and your stone material). We did not and it meant hours of my husband removing a portion of the undermount frame from a tiny crawl space after the kids were put to bed. He was thrilled.
So here is the tub faucet. We were able to buy brand new high end Graff faucets at a third of the retail price by going through Green Demolitions http://greendemolitions.com/. Green Demolitions sells luxury commercial surplus and donated kitchens, appliances, bathroom fixtures, home decor, etc. from houses being demolished and renovated in Greenwich and New Canaan, CT, Scarsdale and Bedford, NY, and beyond. Donation proceeds benefit Recovery Unlimited. They don't only sell demo parts but also brand new parts donated by various companies. They're located in NY, NJ and Connecticut but will ship to you. They were great to work with and the quality of the faucet craftsmanship really shows.