I've decided to create my own Miscom sound.
It includes parts from the Intro theme.
Hope you like it.
Go to your installed GTA III folder and open \audio.
For example: C:\Program Files (x86)\Rockstar Games\GTA III\audio (It's only an example)
Then you only have to replace the old miscom.wav file with mine. Done!
Don't forget to backup the old file!