Handling Depot Repair in a Multi-Org Environment

When we implemented Depot Repair the requirements only included supporting U.S. customers. A recent aquisition has changed those requirements to include customers from other operating units. Since our customers are segregated by operating unit orgs we are struggling with how to configure Depot Repair so that the administrators do not need to "change hats" to process each depot repair order. Currently the users would need to have a seperate depot repair responsibility for each operating unit they are supporting.

It seems to me that this module would be designed to allow the use of one responsibility that could transact for any operating unit. I am thinking that the issue is that Customer Master and Inventory orgs are different for each OU and one solution is to put all the customers and all the inventory items in a single org. We don't like that because it we think it would degrade the user experience for other OM and Service users.