The controllers for the old ones went on eBay. I believe there were 5 of them on there, I was able to get one before they quickly sold, didn't even know it was from TMI until it came in the mail!
Here ya go! The only things I added to it are the air line fitting and bushing. Running it on a 20 gallon compressor at 120PSI this thing is pretty loud!
Even though I have been trying to sell a lot of my sirens I found this on eBay the other day and couldn't pass it up. It is a 6-port Kidde CO2 powered fire suppression siren. Before a CO2 fire suppression system would discharge this would go off beforehand to warn of the impending release of CO2 gas...
VS stands for Vehicle Siren, I own a CS3 which stands for Coded Siren and a GP1 (GP stands for General Purpose). Sorry but that's all I know right now.