Enriching External Invoices (810) Before Voucher build

OUTCOME: best delivered or custom approach for enriching External Invoice load

• We will be receiving ANSI X12 EDI 810 from Vendors
• Some of them won't have PO values populated (utility-like bills for services rendered), so voucher build won't have enough information to construct a valid PO

What's the best way to enrich these staging records BEFORE loading them into Voucher Build?

1. Custom Component / Program (e.g., if Vendor 12345 and UNSPSC code ABCDE create distribution records for department 234 and account 996
2. Some delivered tool I'm not aware of?
3. Something else

Gary