For stings (solo), look for Cadenza or Florestan.
For a reverse cymbal, search for sonic implants- it should be a demo sf2, so it's free.
Well for a reverse cymbal, you can also just find a cymbal sample and uh...reverse it.
What about the reversed attack of the crash. It sounds very awkward when I just leave it the way it is reversed.
why don't you just slice the end before the attack? easy enough to do.