Geetha:
You are in a classic startup situation here: You see an opportunity but want to gauge the marketplace before committing to large production. The challenge here will be to find a confectioner (I am assuming you are talking about some sort of bonbon here and not bars) who is willing to work with to develop custom recipes without any commitment on your part with respect to eventual purchases of the recipes you develop.
In the cases where I've been involved in brokering relationships like these where the client has limited resources (i.e., not a lot of money to invest) it has always turned out that the first products to be tested were variations of existing products the manufacturer already made. For example, a specific center (e.g., a caramel or pralin) in a different mold or decorated differently. In this way the concept you are trying to develop can be tested. Once the concept proves out and there is some basis on which to plan production, then custom flavors can be discussed.
I have yet to be successful in persuading a manufacturer to do all of the development work "on the come" so to speak, especially where the client feels that their recipes are differentiable.
If you do have the resources, be prepared (and offer) to pay for the recipe development; it can be surprisingly inexpensive. This way it's much clearer who "owns" the recipes and you can establish a mutually beneficial working business relationship from the very beginning.
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clay - http://www.thechocolatelife.com/clay/