You should definitely ask in the thread that kode54 linked, but just a little more information:
If you want the sound exactly as-is from SA3, you can rip the game to midi+sf2 using GBAMusRiper and then just extract the sample. However, it is probably a good idea to ask where it came from on the thread mentioned because if you can track down the source, it'll be much higher quality (a lot of GBA samples are compressed to below 16000Hz).