In Star Wars: The Clone Wars, in S1E21 : Liberty on Ryloth, there is a scene where it appears the droids are loading the Ark of the Covenant onto a ship as the pillage the planet while they evacuate. This appears to be a Lucasfilm nod to the Indiana Jones series. Lucasfilm and ILM are pretty famous for their special effects Easter eggs. We also know that ET and the Star Wars universes are hinted at being tied together and the beings from ET have visited Earth.
See the stretch I'm making here? Following that logic, are there any stories that show the Ark of the Covenant being of extra-terrestrial origin (i.e. that is has traveled from Ryloth, eventually ending up on Earth)?
As a non-lore aside, are there other examples of the Ark of the Covenant specifically that Lucasfilm/ILM have snuck into other projects?