- Metal Mart USA 
- Located at 13mile & Dequindre. Sells all kinds of metal stock in small quantities. Even open on Saturdays.
- Motion Industries 
- Loads of mechanical components, in stock. Several locations around town.
- Armstrong Mill Works (No website - http://www.woodfinder.com/listings/004781.php)
- Located in Highland, MI. Sells domestic and imported hardwood in board feet. Open Saturday Mornings.
- Digi-Key 
- 95% of the electronic components you need.