you can build a turbo kit that will run 5-10lbs of boost for a rather reasonable price. at this point the only problem i see is the manifold. It would have to be custom made since no one makes one yet. Unless the SRT's manifold uses the same bolt pattern?
Please feel free to add to it if i missed something.
Manifold (with matching turbo flange)
Wastegate (if not internal)
BOV (blow off valve)
Custom downpipe and exhaust
Custom pipes and intecooler (or just pipes to rout the intake if running less than 5 lbs of boost)
Fuel and spark controller (safc, e-manage, etc)
Larger injectors (not sure what size the factory uses but you may not need to replace them if only running 5lbs of boost)
wideband o2 sensor and gauge (for proper tuning)
EGT (exhaust gas temp.) gauge - from my experience with supercharging a car i learned that these are handy for tuning to ignition timing. If you run too much timing youll get detonation, not enough and your EGT's will go up and burn out the turbo's bearings and the CAT-converters.
For those of us with the CVT we would probably want to run an aftermarket Transmission cooler as well.
I would say a good kit would cost around 2500-3000 with the custom fab parts. If you have a shop do the tuning you could eliminate the cost of the widenband and EGT gauges but i would still recomend having them eventually. For those of us that are crafty you could probably fab a kit for around 1500.