Due to the recent changes to some challenges some have to be redone for me again, this includes "Ghast Comforter" which is now impossible for me since I have already completed the challenges that provides me with the Ghast Egg and can no longer acquire another one.
I am also now stuck having to redo the ghast challenge without another spawn egg ;-; (Sorry, due to laptop issue I wasn't able to get in game to check that until now)
Please pm me on the forums. I will check this out and if all looks good will drop an egg into a chest at the co-ordinates you provide