My house was built in 1950. The plumber told me to buy a new faucet assembly for the 1950 Crane built-in bathroom sink, but it turned out that the new fittings are a larger size than the old sink was designed for. Now I have a sink that doesn't work at all. The undermount sink surround is ceramic tile, with a complete built-in vanity tiled-top adjacent, which the plumber suggested pulling out, all for a new faucet. We don't want to do this, but to preserve the 1950's tiled bathroom. Suggestions?