Yes/no. It's not really a "separate" piece, but you can cut the old one out and splice in a new one from the parts store.
It's that molded plasic chunk at the very end of the main power wire with the ring-terminal molded right into it.
Before you go replacing it though, check out that circuit with a volt meter.
Are you getting power to literally nothing now? No headlights? No brake lights? No nuttin'? Or is it just to the fuse panel?
Paul