As most folk are aware, the Red Baron Entertainment/Sim Pilot Experience website is no longer active. Whilst the FS9 payware products are unavailable, Christian had also released a number of freeware support items such as the FS9 NZ LandClass files, updated AirSpace file, various Airfield maps and the FSX patch. Sadly, these are now consigned to cyberspace.
However, all is not lost. Thanks to the Wayback Machine, Christian's RBE/Sim Pilot Experience website has been archived and all the freeware files are still available.
Simply Google: Wayback Machine, enter the RBE/Sim Pilot Experience url, let the search engine do its thing and then select an archived webpage.