What other brands of cases work for the LG Stylo 3?? I'm having a hard time finding a certain character case for my LG Stylo 3 and was wondering if it was possible to use any other ones with my phone??
Welcome to Android Central! It's highly unlikely that a case for a different phone will fit well on your phone, even if the dimensions are about the same. Cases are designed to fit a phone exactly, with precise cutouts for things like the buttons, speakers, microphones, sensors, etc. "Universal" cases are typically terrible, and not worth trying.
eBay is probably the best place to look for cases -- have you already checked there?