We are to find a product to sell to a company, so it's B2B. We can sell anything except shoes. It has to be a product that we can find enough information on.
We also have to decide on a company to sell the product to.
You might think of products you can sell to restaurants. For example, choose a type of drink that is not sold in many restaurants, research its sales numbers and make a proposal of why the restaurant should add it to the menu. For example, I do not drink colas and colas are usually the only diet drinks other than tea at restaurants. Examine the market for diet drinks and encourage restaurants to add them to the menu.
What about selling stuff to a car company? You could maybe sell them something like a built in GPS or a satellite radio system. I would think that you could find info about those and about any of the big carmakers.