How to free issue items to a supplier?

Hi,

We purchase itemA from supplierA, this item is used in the production of itemB by supplierB.

I need to issue itemA to supplierB free of charge - is there functionality available to represent this please?

I cannot send itemA directly from supplierA to supplierB, it must come to us first and into our inventory.

I cannot sell itemA to supplierB or they will increase their handling charges.

Outside processing functionality does not seem to fit because we are not paying supplierB any extra for using itemA.

Thank you.