Took a lot of work to get here, but finally stumbled my way through Noesis and Unity enough to figure this out!
A few FFXI rooms are now available in VRChat. I've imported La Theine Plateau and San d'Oria (North & South). A fellow VRChat user has also brought in Bastok Markets.
It's not quite perfect, but it's amazing to see these areas in VR. Did you know that telepoints are like 12 feet tall? Or that the crags are freakin' huge?
Right now you'll need the beta versions of VRChat, but it does support both the Oculus Rift and HTC Vive. They are really close to stable, so hopefully that will be out soon if you don't want to use the betas. Also, both of these have a desktop mode if you don't have a VR headset.
Oculus Beta
Vive Beta
Room links:
La Theine
San d'Oria
PS: ignore the weird tree textures, new beta version required an updated room build and I hadn't gotten around to it, should be fixed now.