  We report on the efficient method of obtaining CeRh$_2$As$_2$ single crystals
with the use of a bismuth flux growth method in a horizontal configuration. The
crystals thus obtained exhibit much sharper phase transitions and distinctly
higher characteristic temperatures $T_{\rm c}$ and $T_0$, compared to previous
reports. Moreover, in our numerous attempts, we found this technique to be
scalable and repeatable.
