[quote=@Willy Vereb]
[@Keyguyperson]Would you mind to  meet the Morteans?
After getting semi-workable hyperspace travel they went out of their way to explore  the galaxy.
Finding such expeditionary fleet won't be out of question for your civ.
[/quote]

Have them end up in the insanely developed colony that the Terrans inexplicably turned into a 40 billion person metropolis system within a few years.