First, this is NOT the purpose of the RNI report. This report is supposed to tell you how many dollars of material you have received and not matched invoice receipts.
However, you can link using the receipt number to the purchasing distributions. You will need to add another level to the inside of the report (or create one from scratch using SSRS) and you have a lot of work to do.
Why not reprint the receiving distributions or have the reports printed and emailed to you in the first place.