Addresses of supplementary items

Hi,

Does anyone know if there is a way to automatically copy the delivery address from a line into its supplementary items.

We are seeing that if we have one address in the header, then change the delivery address of a  specific line item, that once we calculate it's supplementary items it defaults back to the address in the header.

This could cause supplementary items to be delivered to a different address than the original item in error.

Any help would be appreciated.