contact RT directly. i contacted them earlier in the year just in case the dealership didnt approve my replacements (they did).
RTs are a compressor only update, Pures are compressor and turbine upgrade. the RTs will perform very close to Pures, especially down load and midrange. they'll fall off a bit on the top end but its not much of a difference. imo, pures arent worth the price difference if the engine is stock internals. Pures can make enough boost/power/torque to break the engine.
a pair is $2,500 plus a $500 core for Sport turbos or $1,000 core charge for Red Sport turbos. lead time was two months.