How to create a supplier from an existing carrier?

Summary:

If a carrier created in the system becomes a supplier one day, how can we create the supplier easily?

So far, we cannot search for a party from the Supplier page, then create the supplier site.

I know that we can create the supplier by using FBDI for an existing party, but it's not user-friendly. Moreover, we cannot identify the Party Number from the Manage Carrier page.

Could you please provide the best practice for this requirement?

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