There's no way one company can possibly master all aspects of its business. It's either partner or fail. Your suppliers and distributors. They have a vested interest. Ideally, your business should be a beehive of activity.
Consortia are often the best way to build a business.
Often, local governments seeking to create jobs will help you organize these groups. That's why we pay taxes. Help your partners succeed. Find unusual partners who can crack open new markets.