While not Roland branded, the soundfont uses samples heavily inspired by the 90s/00s Roland romplers.
If you find a partial SoundFont, prioritize these five iconic Fantom-X presets. Without these, you aren't getting the "Fantom sound." roland fantom x soundfont free
The Internet Archive is a goldmine for "abandonware" or legacy sample libraries that are no longer commercially available. While not Roland branded, the soundfont uses samples