Consigned Components Out - Assembled Product Back

We have a user case in which we send components, taken from our A-Iventory, to a vendor for light manufacturing/assembly. We then receive from them the assembled items.

Question: If anyone has done a similar scenario, do you set up a custom sales order form for the outgoing shipment? Or, instead, do you change the account on each item to an asset account such as Consigned to Third Party? Additionally, then, do you do a journal entry when the finished good products are received (on a regular PO, I presume), to consume the components and reverse their consignment status? Alternatively, I was thinking of "building an assembly" upon receipt of the finished goods, but that seems tricky.