Toontrack ships a 250gig 48kHz/24bit USB 3.0 drive for Superior Drummer 3.
I think some of the originals may have been recorded @ 44.1kHz/16bit but I asked for 48/24 maybe 10 years ago so I think that would of at least got them to start recording @ a higher rate.
You could put a column for the recorded rates in the RealTrack/RealDrums pickers maybe ?