I have been looking too... the swap is not too to bad but they're not avail yet. The Tremecs avail have the shifter around our back seat, lol, won't work... As mentioned above FR have them, so does Steeda, Rouch, Saleen, etc... it will be avail to us soon! They will however NOT be cheap... am guessing 3500 for a new one... so around 5K with install does sound like a possible number...!!
I'd do it to handle future mods, stronger for let's say +700 RWHP, and for double overdrive so I can put in 4-10's and still cruise the highway in the low 2000's...