I want to make a new wiring harness for my tractor. Cub Cadet 7360ss diesel utility tractor. Original harness is completely destroyed by fire. Plan is to make a new harness with only the bare essentials to operate the tractor. I have the schematic and plan to redraw it accordingly.

Question for this group: What is a good source for quality wire, components such as fuse block, or perhaps a DIY harness kit? Open to suggestions on how to approach this challenge. Never built a harness from scratch before. Thanks in advance for any advice.