Hi there! I did a google search for herp events in LA and came up with this:
Aug. 13-14
Pomona, CA
Reptile Super Show, Los Angeles County Fairgrounds/Pomona Fairplex at the LA Pet Fair, 1101 W. McKinley Ave. Info: Ramy Guirguis, 619-281-7387; reptilesupershow@gmail.com, reptilesupershow.com.

It's all the way in August but it gives you something to look forward to. There might be more, just try a search locally too for a reptile store. (In MA it's not bad, idk how hard it is in LA)