Suggestions Source for Piggyback label stock?

Does anyone know if there is a source for wide format printable roll stock for piggyback labels? (label on a label like those used for return labels)

 

The application is a relatively small volume (500-1000) full color with five copy variations, so digital print (open to outsource) seems the likely solution. 5X7 promotional piece attached to a box. The 5X7 label will be pre-printed, contour cut and affixed to the box. That label will be contour cut with a 4X4 label inside the 5X7. The 4x4 can be peeled out and affixed by the end customer for another purpose. The matrix left behind outside of that 4X4 is printed with promo verbiage and label removal instructions (peel here). This clip from Avery would show the principle; the bar codes in my case would be a single water resistant permanent adhesive full color label and the outside portion is the full color promotional.



Found this from Avery but not clear if these materials are water resistant and available in rolls for wide format https://www.averydennison.com/conte...4-11 - Sellsheet Piggyback labeling-EN-07.pdf

Hoping someone here has had some experience with similar application.

 

Thanks Firesprint, I'll send your way for a look as things develop. Interesting the terms we use for various applications in the industry. Labels, stickers, decals; I'll add sticker sheet to the list. I sometimes get confused and I've been selling this stuff for over 30 years. Never too old to learn.