Your Ear is the best tool, I think you just end up picking individual instruments and drums to to create it yourself.
With most instruments and drums now having RealCharts midi notation they should be able to create beat finders like EZDrummer and EZBass have where you can key in the pattern or drop a midi file in.
This could be done with Biab as I have suggested in the wishlist before.
If you download the midi file of the song style you need and drop the midi drums into the RealDrum picker window it will show you comparable RealDrums. Also a GUI where you can enter particular beats for each drum/cymbal on a grid then Biab will search it's RealDrumChart database for a comparable RD.
You could do the same in the RealTrack instrument picker window.