Almost complete... but amazing!

The app is great, I can do amazing stuff with it but these days Im trying to make a recreation sound of BBCs Doctor Whos "Breaking The Wall" by Murray Gold, but impossible to put some orchestral drums since it doesnt exist! I tried with the Chinese one but it doesnt suit well! Please can you add some orchestral drums like you put orchestral strings? Thanks!

VolaRaz ??? about GarageBand, v2.2.2