Firmware for fortiwifi 60b

[z37]

I got this old router [size="4"](fortiwifi 60b)[/size] from a closed company Before they handed over their equipment they erased everything (The firmware on the equipment) I got this router It does not have firmware Where can i download firmware And what the name of the file and firmware number

[z37]

Is there any other firmware that you can install on this product? This refers to third-party firmware

if not Is there any other way to make it work ?