It's a renderflag issue, if you want you can upload the files and I'll take a look at them.
I doubt it can be a perfect replica in WOTLK.
Never doubt, if you got the know how it can always be done.This may not be my area of expertise but I know how to get around.
I'm messing around with the meshes at the moment.I wish the login screen was a wmo would be faster to fix.