There's another casing also quite small.
Headway FU-1B.
PSU is slot in the middle.
Although it supports ATX motherboard, but don't get a board width too wide. You might have some challenge putting the board in.
It has
1 x 5.25" bay
1 x 3.5" bay/ 5.25" bay (convertible) (Can put a 3.5" USB 3.0 Bracket here)
1 x 3.5" bay
1 x 3.5" internal hdd mounting holes on the base.
2 x 80mm fan bracket
2 x USB 2.0 in front.
1 x audio and mic port in front
The orientation of the PSU made the depth of the casing smaller than inWin 644.
can consider if you want something short.
The casing come with 2 pieces of metal piece, which till now i haven't figure out what is it for???? lol