Yes. No way to find this fan separately. It's comes with Akasa low profile coolers only. I ask them about, and they say that they can ship this fan for $18 with delivery cost. From the other hand, no way to fit bigger fans in so small-size-case.
I want share my experience of building a powerful mini PC. One month ago I start searching for a replacement of my old one Core i5-570 desktop. As far as I understand, most of the mini PCs based on mobile or ultra low voltages CPU's. Not enough for me, because of image and video editing. I found...
Very nice looking case. Good job!
I think only improvement of GPU fixing and moving power button on the front panel, will make this project complete.
And in my opinion, better use small ventilation holes instead of big ones.