Vicki, it sounds like what you actually need is not a Bio, but promotional material to describe your business in a creative and engaging way that will draw in your ideal audience. I've written many press releases and "blurbs" in the arts and also in Fair Trade retail (for chocolate). I'd liked to know the approximate length you would require (word-count for the content).
I'm not looking for a blurb or a press release. I mention that it is a BIO for instagram so its only 150 characters.