As Richard G says, there are lots of post on the club forum regarding spare wheels. Following the advice I checked out "247Spares" and "Partsgateway" Just search for them in Google.
Parts Gateway sent me a brand new, space saver with brace and jack. I took out the Gunk padding in the wheel well and it fitted perfectly. I fixed a long bolt to a piece of wood (with Chemical Metal) and that screws the spare down securely to prevent rattles etc.
Hope this helps and -- Welcome to the Club.