So classes that aren't listed here does not have an "official/finalized" alt costume yet?
Is there any character simulator with jRO 3rd class character sprites? Maybe I'm not searching hard enough.
Correct, and there are 4 alternate sprites left being Rune Knight, Shadow Chaser, Sorcerer, and Sura. I'm guessing we'll get all the sprites in iRO after jRO is done releasing all the sprites for the 3rd jobs. If we're lucky we'll get them late 2017 or early 2018 IF jRO is willing to share it with iRO.
There's a simulator that has the alternate sprites. Here's the link. The sprites are in the "costume" option.