I think the toyotas all use 12mmx1.25 so the TRD knob is the same on the supra MR2 celicas Some trucks.
I have the rare TRD solid metal 6 speed shift knob.
http://www.satoyotaparts.com/scripts/prodView.asp?idproduct=276490
Looks kind of like this one but its more rare its egg shaped and solid metal 6 speed one.
I can not seem to find it any where it was originaly 75$ when sold came in a box.
but the one in the above picture is $162
Do not mount universal pedals and shift knobs on your car they are held on crappy and vibrate off.
I made a write up on how to swap in Celica GTS or lexus IS 300 pedal set that will not fall off on you.
Also make sure to get a threaded shift knob so the set screws dont come loose on the universal ones and the shift knob doesnt vibrate.
TeamVoodoo makes titanium & various heavy metal shift knobs threaded for toyota and they are afordable.