Absurd Fan Guard, 50mm with studs!
thingiverse
Forgot to remove the WIP flag and upload the pic - luckily, everything works great, you might need to adjust the stud length for your fan though. One of these fans in 50mm size was exactly what I needed, minus the screw holes and with studs that clip onto my existing fan. I'll be uploading images as soon as this thing fits (and gets fitted).
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