golli and graveleye,
Look for something like these:
http://www.china-buzzer.com.cn/buzzer.htm
I went to the Asus site and had a look at your manual. Since your board has that voice POST thingie, you may have to hook your speaker.
As for the fiber washer golli, look here:
https://www.home-processor.com/941.shtml
It will look something that, only much smaller.
Mitch