Another option but it would be unfiltered and uncooled, just ambient. Plus you couldn't direct the flow where needed.The SD card slot faces at the sensor back so is a good start.
I worked in clean labs years ago and if you wanted a clean lab you pressurised it with clean air so dust could not be sucked in under doors etc. Hence the idea. Only needs a few bar of positive pressure to work.
Keep thinking ...
You'll get dragged into this mess with the rest of us...
