I haven't found any, but there doesn't seem to be a factory option for a rear sun shade for the backseats. Are there any good aftermarket ones? I'm noticing it getting a bit warm in the back for my toddler so was hoping to avoid tinting the tint...

Are there any options out there?

 

Something like this: Link?
BTW - That's Australian Dollars, so convert to your currency. (To help you: if you pay in USD, it's about $94 plus shipping).

 

Similar to the option @GrouseK9 mentioned, there is a set from WeatherTech. But I'm guessing you do not want it to block the window. In this case, I think a clear ceramic tint is likely the best / most cost effective option. Everything else I've seen is generic things like window socks or shades which do not look great.