Or, MWSData has a torrent and lots more sources here (Requires free registration) Resolution and filenames vary, so this is for advanced users as I don't have renamers for them.
FanSet spoilers only contain those sets and can be appended to official spoilers with the SDK.
You can play them as is by either replacing the official dat files,
Or copy them to cards/MagicFanset/, start the table, choose Magic, then edit the Paths Settings to point to them.