I've an ongoing... joke, with an exposed shower assembly and, specifically, the diverter valve, which switches between the shower head, and the shower hand piece. The shower assembly was made by Sterling Brass Works, which no longer exists. The stem in the diverter valve is my only issue, and I need find a way to replace/recreate it, if at all possible. I've attached an image of what remains. What is not shown was an exceptionally poorly designed/manufactured "cog", that stuck out, approximately 3/32", which was soldered onto the bottom surface of the stem, and was what did the work of switching from one output or another, when the stem & handle were rotated. Needless to say, it came off, before the unit was ever installed, and ever since (off & on), I've tried to replace it. Drilled & tapped the hole, which did not work, as there's not the thickness to the flat of the stem to secure something in such a fashion; attempted to re-solder something on, but am limited with my eyes. The other of the holes was done by someone who swore up & down that he'd fix it, no problem, etc., etc., took it, lost it, found it, drilled & tried to solder it, lost it again, and only brought it back today, after more than eight months, needless to say, in worse shape than it left. And so, now that I have it again, I turn to those in the forum who might know where/how to get a hold of a stem such as this, or one that may be successfully modified, to do the job. Any further details/measurements are readily available. Thanks very much, Ray~