I forgot to get pictures of my parts but Bryson’s link shows the blocks.
IMO an important part of the system is the carpet liner. It is a short-pile carpet-like material that acts as the loop end of hook and loop. The blocks stick, but also don’t mess up the surface of the liner.
VW released the Atlas recently.. might be worth checking out the cargo area of one of those to see if the accessory for that model is anywhere near fitting.
We had those (or similar) in a 4Runner once upon a time - I think it was in our 2002 model year.
They can be sourced outside the stealer network - here's one source. Not affiliated with them, just found during a google search.