I too was in the market for a cooler looking knob. Problem was the push button on the automatic, couldn't find new one with it, or refused to pay what they want for it, $100.00 for some cases
That problem was solved when I decided to ignore the button. I just simply bought a aftermarket MANUAL shift, and push down on the column to shift gears. There are plenty of aftermartket suppliers out there, I told you this little story so you don't feel trapped in having to fing one with a push button. Don't go crazy looking for one, I found mine at autozone for 20.00.
Mid-America has them also (with a puch button) for c4 models and up, but I think they would work also. Good Luck.