It's not hard to get one of those.
1. Become a professional auto mechanic.
2. Get a job where you have your own assigned bay and an account to purchase tools, toolboxes, etc.
3. In about twenty years, you will need to replace your toolbox with something newer and larger.
4. Take the old tool-box home.
5. (Optional) Erect a steel building in the back yard, with two long bays, wood-stove, stove that burns old engine oil, bathroom, coffee-maker, utility sink, etc. Purchase a used lift and other accoutrements.
Worked for my Daddy. One additional tip - a tractor and a truck as old as you are will look real good in that garage, if'n they're beat-up enough.