I have to say, it's a very difficult room to obtain considering the quest was retired a while back. I hate to say it but I think if you do find someone with a code they're going to want more than what you have offered considering how rare it is.
I agree. I have not seen a haunted mansion room in a long time. Not to go off topic but you should also try VMK forums. There is alot more people there so you might have more luck. But adding is also an option.
Lately, I havent seen any Haunted Mansion rooms in vmk. Must be pretty rare.. My guess is that the codes aren't around anymore and I think the codes were from the WDW adventureland quest. And when I went, the quest wasn't there. So gl!