Sorry can't help with supplying a document. But if the standard is asking for a "formal documented process" - then you would need to have something documented regardless of what you call it - and how detailed it is (eg, it might be just a section within a document on business continuity)
If you are already doing BIA, then could you just document that, or are you needing clarification/confirmation on how you should be doing a BIA.
Sorry couldn't be more help