Thanks, I will.
I made some phone calls around town and wasn't successful in finding the type that I found on the Internet. So I ordered two from a place at ddsp.com and hope to get them before last night's visitor decides come back and try and pull something.
If you go to the website click on Home Alarms and there, near the top, is the one I ordered, AL26. With a 130 decibel rating it should wake the neighbors and get the bad guy freaked out enough to run far, far away. Or so I hope.