Q: How do I locate the physical location of a sample/loop?

I know the usual locations for Apple Jam Packs. I have a few samples that I installed, that aren't part of the Jam Packs. One in particular has been giving me problems when loading a project that contains that sound. It seem to take forever when it gets to that particular sound. Sometimes it comes back with an error (after a long time) saying it could not find it. There is an option to "try again", and then it finds it. I'm trying to figure out where on the hard drive, that sound is stored.  Don't understand what is going on...  Here are some screen shots showing the the sound in question.

I tried right clicking on it to see if there was some sort of "reveal in Finder", but I didn't see anything.  Hope someone can help.

Thanks