Tracking of die issued to Sub-contractor

Dear Experts,

                    We have following scenario -

1) We issue Purchase Order to Vendor A to manufacture a die and delivery to Vendor B

2) Vendor B is our sub-contractor. He will use the die received and manufacture finished goods. We will receive the finished goods. We are not providing any raw material to vendor.

3) Used die will go for repair from Vendor B to Vendor C after repair visa versa. 

How we can map above said process in SAP ? We need to track the following things -

1) Which die and its quantities are laying with Vendor B  and Vendor C ?

2) How we can make receipt of FG manufactured by Vendor B 

Regards,

Abhi