ecoscorecard vs. invoice

In the past, whenever I have pursued MRc7, I have always provided invoices as supporting documentation. However, on a current project, the furniture vendor / manufacturer is refusing to provide an invoice, but has provided a fully executed ecoscorecard. The scorecard provides the material cost, percentage of wood-based product, FSC designations, percentages for FSC mixed where applicable, etc. For all intensive purposes, the ecoscorecard appears to provide all required documentation in support of the credit. Ecoscorecard is widely accepted as supporting documentation for all other MR credits, as well as IEQ credits. However, will it be accepted for MRc7? MRc7 is unique among the other credits, as it is the only credit that requires an actual invoice be provided. Has anyone successfully attained MRc7 using ecoscorecard as supporting documentation in lieu of an invoice.?