Yes there is a Siren that has Hi/Low still available. Senty will make a 10V2T with the damper's like on a 3T22. I found out today from someone.
Will they make a 40V2T with Hi/Low??? Because That is what I would like to hear
well it says on there page that if you have a special project that you have in mind they will make it happen. but that would be really cool to hear though