Thanks! It's not as functional as a Suntour but style is everything.
I'd been looking or a suitable chunk of aluminum for this purpose for a while when, on my morning ride up 8th Ave on my way to work, I found a pedal and half of a crank arm. And when Providence offers me a piece of cheese, I take what she offers. I had to fill a groove in the back of the crank arm with JBweld; you can see a hint of that --it appears as a dark gray shadow-- in the photo. Then I hacksawed, drilled, filed, sanded and polished the present shape out of the raw material of the crank arm. The lever itself is pretty primitive. I cut the cable path with a hack saw, which lines up with a two-step drill hole for the cable head. It lines up with the cable stop in the shifter body just fine, but my design does put a kink in the cable near the cable head; I suspect this will cause fatigue and premature failure. I first used this shifter for switching between wide and medium on a Sturmey Archer S5 hub, for which this was pretty successful. Now I've switched it to the Resilion derailleur, which has a very strong spring, and this shifter doesn't hold it quite well enough. I'll probably be able to fix that with suitable washers....
Nice. I thought I was slick with filing that brake arm, but your filing handiwork takes the cake.