www.mrt-direct.com has some ball-type knobs for the 05. I have one in my car. Be warned though, a few caveats:
1. The knob itself is threaded for an SN95 shift handle, M12x1.75, and has an adapter that's threaded into it so it'll fit the 05 handle. IMO, it's best to put some red loctite on the threads of the adapter and let it cure before installing it.
2. The knob comes with a jam nut, but it's too thin to be of any use by itself, which leads to the 3rd issue -
3. The stock shifter boot has a large rubber o-ring that is designed to fit around a lip on the stock knob. Well when you take the stock knob away, there's no lip on the bottom of the new knob to keep the boot in place, and it flops around and looks like crap. So I had to improvise: Get a new jam nut and a large flat washer the same diameter of the lip on the stock knob. Thread the jam nut on to the stick, all the way down as far as it will go. Then put the washer on top of it, then the other jam nut. Finally, thread the knob onto the stick and get it down as far as it will go, with the shift pattern facing the right way. Then back the top jam nut into the knob tight, then back the bottom jam nut/washer into the top jam nut. The knob should be solid and tight at that point and not rotate at all. Then, wrap/pry the shift boot around washer and voila - you're done!