Yes, you can use the technique in the
FIX for broken Imp Council Member quest topic (a bug in the disk version which was fixed in a patch) to get the quest from Homer. See the topic for details, but in brief you need to save the game, back up the dialogs.000 file, replace it with one from a new save (or anything before talking to the travelling merchant and Reginald), reload that save, talk to Homer and get the troll quest, head to the cave and clear out the trolls, return to Homer to complete the quest, save the game, place the backup of your original dialogs.000 file in that save (overwriting the temporary one from a new save), and then reload that save to continue.