Might be easier and cheaper to build you own kit. With the advent of the SRT-4 and it's factory turbocharged 420a, i'm sure some parts are bound to fit

It's an untested idea though, no one's actually taken the time to see if things will bolt up, but like every major manufacturer, saving money by using many interchangeable parts in many models is a common idea. Of course, finding an srt-4 manifold won't be cheap, but atleast you'll be able to choose whatever size turbo you desire and whatever wastegate or blow-off valve or intercooler you like, and build according to your budget.