CHP siren amplifiers

[stubes]

trying to figure out what is the correct siren amplifier for a 1993 CHP mustang?
Is it a chp specific piece? If not anyone have the make and model #?
thanks

[Wolfe1013]

Hey Stubes, have you found this? Scroll down to Siren and Light Controllers.

http://www.wb6nvh.com/CHP2001.htm

Not sure when the Federal Signal PA 500 siren amplifier mentioned went into service.

Greg