So far I’ve checked Crunchyroll, Funimation (now Crunchyroll), Amazon, and Tubi, but no luck with the dub. I’d be open to buying a digital copy if it’s offered somewhere officially.
The full 51-episode series is more commonly available in its original Japanese audio with English subtitles on various "retro" anime community sites, providing a more complete narrative experience than the cancelled dub. Rave Master English Dub Torrent Download