I had to replace the hotend fan a few weeks ago. 3DPC had the correct fan with the correct cable attached.
You can adapt a 12V fan if you know what the rated current draw of the 12V fan is by adding a (12V/current draw) series resistor. I had to do that with my lights.
Grabbing a datasheet pretty much at random, you’ll notice from the cropped table that the 12V variants have the same airflow characteristics as the 24V variants. They only differ in that the current drawn is slightly more than doubled.
