Excel: need to put a unique PNG on each matching row

I have an Excel spreadsheet I use to get Batch QR Codes created for me. There are two columns:

ID                  URL
123                [QR Code content1]
456                [QR Code content2]

and I got back multiple PNG files:
123.PNG
456.PNG

And I need to get those QR images back into the correct row in Excel. How do I do this?

ID                  URL                              QRCode
123                [QR Code content1]     123.PNG
456                [QR Code content2]     456.PNG

I need to make this automatic, since I may do batches of hundreds or records.

How can I import these images?

Thanks