Bulldog, my shifter is exactly like the one in your picture. The lever itself is a different shape, but the guts are identical. The "plate holder" is the part brazed right to my frame.
Rmfnla, that is a really clean looking installation.
Thanks for the input, everyone. I'm going to buy the shifters and see if they come with housing stops. If not, I'll order something like the ones pictured, or maybe some plastic ones I saw at Bike Recyclery.