You tried subscribing here? https://steamcommunity.com/sharedfiles/filedetails/537633930 BTW it showing a "File Size 0.00 MB" on the item page, has nothing to do with the item not being there, you should still be able to subscribe to it and it will download in Steam. Also you can't download direct off the Workshop page, you need to subscribe to get it.
@Christopher Elliott. Weird I can subscribe now - maybe just something temporary. However I wanted to download this for dedicated server, so does this mean we can't going forward? I used the legacy stuff for now, but if I download from workshop I just get a cache file