A "supply company" is a company that provides goods or products to other businesses or individuals. It specializes in supplying and delivering items that are needed by customers for various purposes.
This can be bought at most animal supply companies. (cap4pets.org)
I got a pump before I gave birth — I called a medical supply company in my insurance network, and the pump was covered, and they sent it to my house. (babycenter.com)
This covers regular medical expenses provided the insured supplies the company with the required bills. (policybazaar.com)