How to Supply Plan for an item based on the demand/Supply of another item

I have a situation where an org buys an item from a supplier. This item is essentially a bundle of 3 individual items sold by the supplier as a KIT. The client then uses a dekitting work order to break this item, which updates the inventory (decrements the KIT item inventory and increases the 3 individual items inventory). These 3 items (Say Items A, B & C) are then sold to customers.

Problem statement: Planner want to Supply plan for the KIT item (which is a buy item), based on the demand for on the one of the individual items in the KIT (say Item A) How do I implement a solution for this? My initial thought was to create a planning BOM which will reside in Supply Planning Alone. This planning BOM will have Item A as the parent Item and The KIT Item as a component item. Supply Planning can then recommend buy planner orders on the component (KIT) since demand from Item A will explode down to KIT.