I think it fits Riden RD6xxxx, I have a RD6006
Best PSU for this case is probably LRS-100-48 (I use LRS-75-24 becuase I already had it)
Has room for a 40mm fan, unknown how to power it, Y-split the Riden-fan connector maybe.
Also have vents in the bottom for full circulation (needs feets)
(Don't print it in blue and mind the seam location, mine looks unnecessary ugly)
The author marked this model as their own original creation.