Morrow Project games truly revolve around caches so you will probably be able for find quite a bit of stuff on MP gaming pages.
The best starting point for MP stuff is
The supply bunker (I recommend a look here for any post apocalyptic game player)
Are you looking for military caches, survivalist caches, government caches, personal caches, business caches? Each would have a different flavor as to how things would be stored and what would be found.