Prevnet customer owned material from being valued when placed on NonStandard Discrete Job

We have material returning from our customers for repair.  Upon receipt these are placed in a non-Asset, non-nettable subinventory.  At some point we need to pull one of these parts into a non-standard discrete job.  The users have requested that any material issued to a Non Standard work order from a Non-Asset subinventory have no cost associated with the WIP job.

Customer owned material is sitting in our "normal" inventory organization, we have no desire to set up a customer owned inventory organization.

Does anyone have a recommendation on how to handle this situation?