Where can you buy red grape malt duck?

It sounds like you might be mixing up different terms or concepts. Could you clarify what you're looking for? Perhaps you meant:

* Red grape malt: This is a type of malt used in brewing. It's not a product you would buy at a grocery store, but rather something used by breweries.

* Duck confit: This is a French dish made with duck legs preserved in fat. It's often served with red grapes, but the two aren't combined into a single product.

* A specific type of duck: There are many breeds of ducks, some of which might be red in color. If you're looking for a specific type of duck, try searching for it by its breed name.

Please tell me more about what you're looking for, and I can try to help you find it!