I have a Roland JD-08 Boutique and I converted the sounds from original sysex by Francis Rimbert to Roland JD-08 and Roland Cloud.
In this archive you can find the original sysex files from Rimbert, backup of JD-08 with factory sounds (Bank A&B)+ Rimbert's sounds (Bank C&D) and Roland Clouds sounds. You can find also JDTools, an utility than I have used for conversion.
https://www.mediafire.com/file/uyaedo5s ... s.zip/file
*for load sounds into JD-08 please refer to instruments manual in restore backup section.