My house was built in 1924. The bathtub has a Kohler 3 valve(?) faucet. One hot, one cold, and a tub drain valve. It appears that this item is no longer manufactured.

Is it possible to successfully replace the stems so that it does not drip? My plumber did not want to replace the stems, but a plumbing supply store about 100 miles away said they would try to match the stems. It is my understanding that there is also a "seat" that is probably worn.

My plumber says the hot/cold valves cannot be replaced with updated fixtures.

If it makes any difference, the house has terrific copper plumbing. We have access from the back of the tub and would prefer not to damage the existing tile.