Generally RAW images in many of their formats - including FPX are not exported to RAWs again, but rather some variants of Digital Negatives, like the DGN from Adobe Photoshop.
Convert Kodak FlashPiX bitmap image to Digital camera photo RAW image format.
We have found 4 software records in our database eligible for .fpx to .raw file format conversion.
Microsoft Windows software - convert fpx to raw on Windows
Adobe's professional tools for RAW image management and post-production
Convert from fpx file format
The tables with software actions are a good pointer for what a certain program does with various file types and often may give users a good hint how to perform certain file conversion, for example the above-mentioned fpx to raw. However, it is not perfect and sometimes can show results which are not really usable because of how certain programs work with files and the possible conversion is thus actually not possible at all.
A digital photo managing and editing application
Photo Manager is digital photo editor and manager for Windows
Apple macOS / Mac OS X software - convert fpx to raw on OS X
Mac version of Adobe' professional digital photo editing tools