From what I can find I don't think there's any easy way to just buy a probiotic loaded with equol producing bacteria and take that. It seems pretty experimental level stuff. It seems to be an ongoing source of research eg. from 2006:
Or a review article from 2015:
The beneficial effects of the soy isoflavone daidzin, the glycoside of daidzein, have been reported in individuals producing equol, a reduction product of daidzein produced by specific colonic bacteria in individuals called equol producers. These individuals comprise 30% and 60% of populations consuming Western and soy-rich Asian diets, respectively. Since the higher percentage of equol producers in populations consuming soy-rich diets is correlated with a lower incidence of hormone-dependent diseases, considerable efforts have been made to detect the specific colonic bacteria involved in the metabolism of daidzein to the more estrogenic compound, equol, which should facilitate the investigation of the metabolic activities related to this compound.
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4381290/
In theory, if you have equol producing bacteria, you could take a daidzein supplement and have them turn it into a steady stream of s-equol. But I don't know how to get the bacteria or to prove you're an equol producer.
inb4 someone kills themselves by trying to ingest "the right bacteria".