Need an advice on how to integrate Blend Management with Requierement Planning

We use blend management module (31B) for our wineries.

As in other industries, we need to balance our supply and demand of end items with our stock of wines. So, sometimes we will need to buy wine, and for some items we will need to sell it.

Have somebody experience integrating Blend Management with Requirement Planning modules?

Is there someone in the Wine industry to help on answering questions about how to manage some characteristics of wines, like harvest periods?