Suddenly no juice

I hear some hissing noise then nothing working, remove the Tach and still no juice. I checked fusible link cable and it turn out to be the red cable at the center of bulkhead connector of the fire wall. I checked at local 95148 Napa, autozone, and Oreilly and the don't have it. Is there a way to by pass fusible link by using a fuse in between? If so how much amps should I be using?
Thanks
Scamp