taillights

Recently the taillights, brake lights & console lights went out on my 65 (4 door). I found a burnt out fuse and in the process of replacing it, i noticed a small spark in the fuse box. now the car has no power even when a fresh fuse was put in. Anybody know what it could be?

Has anybody tried other nova year tail lights and found a fit? http://www.stevesclassicnovaparts.com/68-72taillightlens.html found these and wanted to see f any might fight my 78.