Broken Audio system help

["Barry" <barryminusspam@xxxxxxxxxxxx>]

I have a Kustom KHS 4640 4 source/6 zone system which no longer works
properly.  I have looked and apparently Kustom no longer exists ( bought by
Nuvo) and this unit is no longer available.  My question is do you know if
this is repairable and who might do it.  Does anyone know if these units are
still available anywhere that I might replace it.  I tried ebay with no
luck.

The problem is when you turn on a zone, the source lights do not light and
you can only hear channel A coming through.   You cannot change the source.
Anyone ever experience this problem?

Also, if this cannot be fixed or replaced, what would you recommend to
replace it.  I have cat 5 at each wall controller.  I also had the actual
speaker wires routed through the controller box and then directly to the
speakers in each zone just in case I ever needed access to the actual
speaker wires at the controller units.

Any help would be appreciated.

Thanks

Barry