Vintage Synth Repair

I have been offered a lync ln1000, I´ve been after this one for quite 
a while. Unfortunately some parts for the power supply/battery box 
are missing.

I have no documents or anything but it´s said to be in operating 
condition, just no way to get the power supply repaired .

Anyone knows this keyboard, any chance to get parts somewhere? I 
don´t know what´s the power it works on.

Thanks for any help,

Uwe