BMX Handgrip for parking brake?

[wekilled]

Kind of a small mod, but was thinking of trying to put a handlebar grip on the parking brake, something aggressive like an old school BMX grip or a funky ergonomic grip. First issue is the diameter of the parking brake itself. I am doubtful it would fit.

I figure that someone here has a motorcycle. Is the diameter of the handlebars on a motorcycle tube large enough?

Anyone know of any other unusual grips from machinery that don't have a cheesy "tuner" look to them? ie. Looking for an industrial look on the interior. Think newest batmobile, or the truck from District 9 for inspiration. I have found lots of little rubber parts that I am saving till I can use them: r/c truck tires, black rubber pen grips, that sort of thing. Like to find a small item that could be used on the '99 heater knobs. Figure there must be someone in our group that has tried to find similar items to use for styling and might have ideas.