So another user on here by the name of GoZille, on Thingiverse, made one of these, but it appears to be for another generation due to the fan mounting looking a little different on mine.

See here for his upload: https://www.thingiverse.com/thing:2893964

So because his design wouldn't work for my printer, I decided to take the idea of his and run with it. And this is what I came up with. The converter mounts to the original fan mount by removing the fan and drilling out the holes to be big enough for the stock fan screws to fit. Then simply slide the fan converter over the bracket and screw in from behind. You will have to remove the original fan screws from the heat sync, but I have not seen any issues with doing this.

Be warned that the screw holes on the converter are a little off to the original holes on the bracket, but with a little love they will thread.

I do plane to change this part converter up a little and fix the screw hole tolerances, but this works for now so I figured I'd upload it.

The 12V Noctua fan I used can be found here: https://www.amazon.com/gp/product/B009NQLT0M/ref=oh_aui_detailpage_o01_s00?ie=UTF8&psc=1

No need to buy the 5V or 24V and have to put a stepper in place :)

Lastly I haven't come up with another way to mount the fan besides zip ties. So I included some holes in the part for small zip ties to fit through. But again they are off a little, so I put the ties in first then stick the fan in.

This can also be found on Thingiverse here:

https://www.thingiverse.com/thing:2942031