Is there a standard OTM object to use to represent Suppliers for use with Ready-To-Ship?

Summary:

We have a need to configure OTM for Ready-To-Ship to handle a relationship between suppliers and customers such that a supplier could supply to multiple customers and a customer can have multiple suppliers. Additionally, a supplier could have multiple OTM users. We need to develop data level security to ensure each supplier only sees their Order Bases/Releases. What are the standard ways a supplier is represented for Ready-To-Ship to support these levels of cardinality? Any Pros/Cons of the different options?

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