After the FV takeover, he disappeared (i.e. the programmers took him from the colony and forgot to put him back in the game). Naturally, /petition got the usual no-answer from the GM...he did not even bother to investigate my complaint, he simply said "find a friend who is a druid blah blah". So to complete the Trep quest, I had to buy from Ootok in Neriak (who is now in Grobb). I forgot whether I illusioned or had a non-kos alt do it.
But apparently enough complaints came in to get EQ to fix their oversight. Dom is back in the game. He can be found with the other FV escapees in their encampment area, in the center of the large ruined blding, location 465, -3350 (approx).