On Sat, 9 Jan 2010 00:09:34 -0800, Godspeed wrote:

Instead of looking for a valve stem to fit the faucet knob, why don't you
find a faucet knob to fit the valve stem?
http://www.faucetpartsplus.com/Default.asp

+1 on finding a faucet handle to fit the Symmons TA-10 stem.

I think your numbers are wrong though. Looking at the URL, he needs the 12
point .415" broach - Symmons

Maybe a faucet handle for the slightly smaller broaches will
12 point .335" broach - Crane Dialeze, Michigan Brass, Wolverine

12 point .375" broach - Arrowhead, Artistic Brass, Harcraft, Glauber, Price
Pfister, Scoville, Universal Brass

12 point .39" broach - Bradley, Elkay, Fisher, Sears, Universal Rundle

Or the slightly larger broaches.
12 point .485" broach - Crane, Symmons