Because both these questions get asked a lot, you can download the whole barovia map here. You can also get an (admittedly dodgy) stl for 3d printing on thingiverse, here. I plan on improving this to match the nice smooth model used on this website. Sadly, if it were easy I'd have done it already. I've also added the geotiff this is based on. It's the most complete version of the model so if you want to try your hand at creating an stl, that'd be the place to start.
Sorry for the lack of content, the wee beasties have stolen me again. In the meantime, why not check out my 3d Map of Barovia?