Adding "View Selected" Button to 3D View

One of the most used shortcuts (for me, at least) is the keypad “.” to View Selected. And it’s so annoying that I have to take my hand off the mouse and look down to find the “.” on the keypad for something I do constantly.

Now I could add a new button on my custom panel, but it would be so nice if I could just add another round button under the Ortho/Perspective toggle button. Anyone know of a way to add this via script? I can’t find any references, and there’s no help when you hover over it.

Thanks.

3DView

Okay, well for now I just re-mapped my F1 key, so I can use my usually unused left hand. But it would be nice if I could find a way to make another of those buttons, or even re-map the Perspective/Ortho button, which I almost never use.