Internal Orders across inventory orgs under one operating unit

Dear all,

We have a requirement to allow shipments from Org A --> Org B , Org A to Org C , Org C-->Org A & Org B --> Org A

in short one destination Org and multiple source org's. Due to limitations in oracle one internal location can not be assocaiated to multiple customers / Cusomer Sites

we are not able to perform both Org C--> Org A, Org B--> Org A  simulteniously. we are expecting order import will import order in booked status with tax attachment. Can any body help on this