Does anyone have a document set to train the IDP ML?

We have just upgraded our IDP application to current and have found that the modeller needs to be re-trained.  Specifically with the "Invoice with Line Items" document set originally used to train the IDP Classification/Extraction engine.

There used to be a zip file (we think we remember one anyway) that contain set of varying documents that fit into this category.  Does anyone have a copy of that (or similar) that they'd be willing to share.