TRD knob came with the package and I think that's the only way you can get it, and yes before Chris even had the shifter out of the car I took the knob and had it on my car on the OEM shifter.. it looked and felt AWESOME

I took it off to take the pic this morning and I put back the IS300 knob again and it feels a little higher for some reason even though they're about the same size and shape.
BTW the shifter fits ALL AE92s, I would assume it includes wagons as it has a thick plate to adapt to normal AE92s and a thin plate for 4AGZE AE92s.
I believe Chris paid $150 US from a seller on Ebay not sure if it was plus shipping or shipping included.
And yes.. WE (not I) got a Civic.. it's her beater.. I drive it sometimes and I actually like it.. I was always a fan of the EG and EK hatches.