Bathtub faucet conversion to ceramic valves with old trim

[spresco]

I have a 1939 kohler 3 handle 8" spread wall mounted bath faucet. I have been fighting drips for years by replacing the valve seats and washers. I would like to replace the valve body with ceramic valves but want to keep the original trim. Are there ceramic valves with bonnet nuts that would accept the trim and handles? The stems have 19 splines.

 

[spresco]

Do they make another type of valve or valvet to replace this stem?

 

[Sponsor]

 

[hj]

NOT for a 1939 valve.