I have the racingline short shift kit which is awesome, I use the RAZO 360g as my knob
Ther are no Billet Style Short Throw Shifters for the coupe, its a different set-up but racingline came out with an ingenious kit that you install at the ball joint in teh engine bay that shortens the throw by about 1/3, its great. There are knobs out there that are compatable such as ones from latherwerks, Razo and the Abrhams....but I havent seen a T handle..
http://forums.altimas.org/zerothread?id=396159