Does anyone have a vendor of choice for a PA system that can interface w/ a Norstar Plus ICS 2.0 Startalk Flash NVM 3.0.10A configuration?

I had a 1970 model amp, but it finally burned up.

Need a replacement.

I have 4 buildings I would like to be able to page individually, so if anybody can recomend a source for such an amp, it would be greatly appreciated.

Thanks


Thank you
ITphoneGuy