Okay, so I went digging around on Amazon and found this! Poor reviews, but it's at least similar to ones I've seen and had in mind.
I have the Masterson Sta-New Brush Holder and it works really well for drying brushes upside down. https://www.amazon.com/dp/B00CSV2G5G/ref=cm_sw_r_cp_apa_i_R.s9Db950DA87