I had the TransGo shift kit in my LS for a little while before I swapped to a manual. You can get it through summitracing for under $100. If you have never done any type of transmission work, I highly suggest you getting a shop to install this kit. I also highly recommend you getting a transmission cooler too.
I think I have a wright up somewhere on here, but like PD ^^^^^ said, the SC forum has more info on it.