The plans you're referring to are those created by Bob Read, who is a frequent and respected contributor around here. To say he "went out of business" sounds a bit harsh; he has elected to stop selling his plans but his site is still quite active in hosting his research articles.
If the Hahn plans aren't to your liking, have you considered the colour artwork done by Cyril Codus? I don't know if he has a web site but I believe he can be contacted on Facebook. Apart from the gentlemen mentioned above I don't know of anyone else selling large scale Titanic plans.