Friend of mine has 2010 lancer raliart that calls for that fluid, he got it in gallons from japan for 100 per gallon, worst design for a container for sure.
What you are looking at for $100 is the DCTF for the Lancer Ralliart. Those are only sold 4 liters at a time. You don't have to use Mitsubishi's insanely expensive fluid, Ravenol makes a DCTF which is a perfect replacement, and I use it.
That is completely different from 75w85 GL-4 that goes into certain evo transmissions, which might be sold in individual quarts or liters. Some other Mitsubishi manual transmissions used a 75w80 GL-3 that might be sold in quarts or liters.
I'm not sure if Mitsubishi 75w80 GL-3 or 75w85 GL-4 is what would work best in your Hyundai. You would have to know more about Hyundai's OEM fluid before determining what fluid to use.