You have a couple of avenues you can take -
1. Get a small business loan from a bank with the help of the SBA
2. Ask family and friends to assist by investing - always tricky
3. Find an angel investor or silent investor who is willing to put up the capital and receive a nice return and let you run the business, with the potential of buying the investor out at some point.
4. Find a large retailer who will buy your product in bulk and then you can afford to purchase, put your company labels on (if you`re selling private label) and this will give you immediate income which you can use to grow your business.