Odd. U sure they didn't just have to go to the bathroom?
if they dont appear, then relogging should bring them back, unless they are meaning to avoid you.
For hours? Probably diarrhea.. xD
Hmm....If this was your first visit to Sol and Earth, and you have not gone through the Rift then they should be there. However, if you have gone through the Rift you won't be able to get the bribe, in which case, you may have to spend some time in Kandiris or Mandar killing Nomads to fix your rep with the Coalition.
Well yeah i already passed some Coalition Systems while leaving the Alien Systems. I'm gonna try that tomorrow.
Anyways thanks for the quick response! 
