If I were to begin mechanically restoring it myself, my 56-year-old 1964 Cub Cadet 100 needs at least the following parts (preferably NOS): muffler, hood ornament, front headlight assembly (it was not originally equipped with this option), battery tray, and new wiring just to be safe.
Are you looking to sell a 100 or do you need help with restoration? I’m in Franktown and could help you along or share my contacts here. I have downsized my machine shop but can make oddball parts. I send out my engine blocks, heads, cranks, and rods to a guy in Denver now. Are you in the springs? I have over 15 years experience a million years ago in the restoration and collision biz. Might even have the paint you need for the early white. Anyway the 100 is a fine tractor, worth keeping imho.