Need help in adding item in IB as Inventory location type

Summary:

User wants to add consigned components to Install base as parts are consigned to customer so the location type needs to be Inventory. In Install base create Asset Automatically or manually doesn’t put the stock in inventory location type.
So Business wants to add these items to Inventory first. But we have few constraints here.
1. By creating an Account Alias transaction.
User comment: This was rejected by Finance as it is going to affect costing.

2. By Purchasing the component.
User comment: not applicable in our scenario because we are not purchasing these components.

4. Manufacturing work order completion to inventory.