You don't have to check Wikipedia for that. There is a 2nd entrance, but never seen it open myself and not sure if it's used these days. For game purposes, it makes sense. A very skilled 3D artist would have to work on this, or at least more people interested working together. So far there are no volunteers...
It's a complex project. Flash has sent me something and then I started searching. That's how I found these models. The other ones are garbage. The one below sells for $80. $15/$20 vs $80 is a big difference