RosettaNet Issue - Internal Partner TN Profile without DUNS

We have a typical design problem in one of our rosettanet implementation.

We need to transform one of our internal invoice document(received from one of our internal application) to PIP 3C3 and send it to our external partner.

The problem we face here is that the internal partner’s profile(for the internal application) do not have any DUNS id defined and since RosettaNet mandates the existence of a DUNS number we are not able to successfully deliver the PIP3C3. It is obvious that we cannot have DUNS number for each of our internal trading partners/applications.

How do we resolve this ?.

Any help would be highly appreciated.