A friend of mine has a Speakman shower valve in his stand up shower. The valve is in good shape and he would like to change the trim. The trim plate is about 7 inches in diameter with a small hole in the center in which a threaded shaft from the valve comes through. There is a piece that screws onto that shaft to hold the trim plate to the wall, and then the knob attaches to the spline at the end of the shaft. My question, can I get a trim kit for this valve in a brushed nickel finish?