Advice Needed WTB Under Dash harness '72 Scamp

I bought a '72 Scamp 6 cyl automatic A/C car. My friend is helping me to get it back on the road. He's been trying to trace a short. The fuse for the tail lights & running lights (20Amp) keeps blowing. Previous owner or somebody did some amateur splicing. Smoke has been coming from under dash. I would like to replace the harness that runs from glovebox/ courtesy lamp and the rest of the harness under dash from that side towards the bulkhead. Can anybody recommend which one that I should buy? I want plug and play with all proper connectors and labeling in place. I'm trying to make it as easy and proper as possilble. Who sells this?