I've been soldering more things, and with soldering comes fumes that you don't want to breathe in.
So, after a couple of hours in CAD, sixty hours of printing, and a few minutes of assembly, I have this beast.
Inside is a 140mm fan, so it's nice and quiet, and 130mm replacement charcoal filters for a commercially available fume extractor. The filters friction fit in front of the fan, so it's easily changeable. I have a 12V wall wart power supply and a switch on the back.
Parts I used: