This is what I have on my bike. Pro Grips, $12.99 (I think) at Cycle Gear, but a lot of dealerships also have them in stock.
In case you are not aware, the stock throttle tube has raised ridges at the front and back that a channel in the original grip fits over. With my grips, I had to grind the ridges off with a dremel to get the grips to slide all the way up. I think some of the Harris grips have the channel made into them, but I liked the looks and feel of mine much better. They are very comfy!