the Aurora is polycarbonate, the normal IKKI68 was aluminium, so if you can settle for PC then it is an option for sure, it also depend if you like the colors of the Aurora Dreamscape. and if you do not mind waiting a long time given that it is running with a keyset, so at least one year of wait time nowadays, and the Aurora is meant to be easy to built in plenty of colors so you will see it again in other colors available, no need to fear on missing out if you are not all about that colorway. (it is the 3rd time it runs with a keyset and it also ran by itself with 4 colors previously so i think it is a pretty safe bet we will see it again)
and as far as 68% goes it is a pretty common for factor, there are plenty of pcb and cases that you can buy from in stock vendor or that are open source and that you can order from manufacturers, if you are really desperate, you would have asked 100% or above, that would be an other story.