I have a pile of old power supply fans. This one came out of a server power supply and is very powerful. I hook it to a 9V battery now and then for some rapid cooling on the spot. I figured it would be a good match for this.
Stack them all up and it is complete. I "glued" the adapter directly to the enclosure using pure acetone and a q-tip. I went around the edge a few times to seal up any little gaps I saw.
Well once I hooked this to my power supply I got quite the surprise. Sure I knew it was a few more volts but dddddaaa####*** this thing is so turbo you can feel the air blowing out any orifice from a few feet away. Needless to say, I am going to install an inline switch and turn it on only now and then during longer prints. I might need to downgrade the fan a little since it is just so powerful.