A Reply to Inquiry and Inability to Offer Substitute sample letter.
Your letter inquiring about [subject of inquiry] was
brought to my attention.
While we manufacture a vast assortment of [products], none of our models fit the description which you provided. We have never manufactured [subject of inquiry].
You may wish to direct an inquiry to the following distributor, whose firm has been in existence for many years and who may have the answer you are seeking:
____[name of firm]____
I am sorry that I am unable to be of more assistance to you. Best of luck!