Cheap Lutron DVW603PH-WH Electronics Diva 3-Way Duo Dimmers, White Review
It kind of shows my age; but the last time I bought a timer for a 3-way switch, I had to get one of those with a rotary knob which don't look very attractive. That was the only way to have the dimming level stay set when turn the light on and off from different locations. Now I am remodeling and using decorative switches and this matches all the other switches and dims the lights the way I want.