Need Wholesaler

Hi, about a year ago I started a tea company. I started blending teas based on companies that already had established blends and blending the blends. Now, my business may be finally getting off of the ground, but I need some guidance as to where to buy just straight up black tea that is similar to the type that the companies that have boxes on the shelves at supermarkets start with. My speciality is sweet tea, and I just need to know what is expected of me to do. Should I keep doing what works? Or should I try to find a wholesaler that can make my blends 100% mine? Also if it is the latter, I need some recommendations on a tea supplier. I am located in the southern US, and I am not a tea room, but a tea company hoping to be on store shelves in the next few years.

Thanks,
Zack