Compustar CS600S Remote Starter - Add Chirp

I had a Compustar CS600S remote starter installed in a Toyota Tundra. Works great, however the lock/unlock "beep" sound no longer works. Sounds trivial, but when I'm walking away from my car in a parking lot, the beep tells me it locked and I dont have to look back. I noticed that the CS600AS that includes an alarm can chirp on lock/unlock. Anyone know if it's possible to add the Compustar siren to the CS600S to add the chirp? I dont care about the rest of the alarm.

I found the "Compustar V6 Mini 126db Car Alarm Multi Tone Siren" on ebay for $17.

Thanks