Sharing Drum Sounds Across Kits

Is there any way to share sounds across kits? For instance, I would like to add a tambourine sound to the Standard Kit. There is an existing sound (wav file) in the Percussion Set. I know how to create a new instrument and name it, etc. Just would like to be able to “import” (or locate) the wav file in the Percussion Kit into the new instrument created in the Standard Kit. These files must be on the SD card, but I can’t seem to locate them.