1989 zx1000b here

i have a fuel leak coming from what looks like the line between the fuel pump and fuel filter but this part is no longer available from the manufacturer. where can i find this or something comparable?

hmmm tough to say, can you take a photo of it?   should be fairly standard fuel hose.  You might just bring the leaky hose to a hardware store and match it up.   get new clamps for the ends.

try that?