Dear

Thank you for submitting (insert name of product)
to (firm) for review and evaluation.

Currently, we are distributing several products of a
similar type, and in order to best serve our markets
we don’t feel that it is appropriate to make further
additions at this time. Should our policies change
in the future, we will consider your product as a
candidate for distribution.

Should you develop or wish to submit other products
in the future that you feel may be of interest to us,
please feel free to contact us. Again, thank you for
considering (firm) as a potential distributor.