Replacing the bushing do little to correct the loose shifter. Most likely the bearing at the bottom of your shifter has seized up or the spacers are worn or broken. If you jack the car up there should be a bolt going through the shifter... check to see if there is much play in the bolt and ensure the spacers are in good shape.
I bought new bushings, installed them, and still had the shifter wobble. It was only once I replaced the bolt and nut with a locking nut did I eliminate my shifter wobble.
This picture is from a 3rd gen but I used a single bend short shifter from my old DA in my DC so I know they are the same. (Picture from Team-Integra.net)
I know this is a super old thread. But I'm hoping someone could tell me where to buy this bushing. I've been looking forever and can't find it anywhere. Thanks in advance.