i use either the kit one or a WTF fan on mine.
you are correct that the plug seems to be the wrong way around. so on my WTF fan, i swapped the wires around in the plug - its easy to do with a knife as long as you are careful.
as long as you get one that is the right size - 25mm - with the right plug, and make sure to check the polarity before you plug it in (not after, which was the first time i used a WTF fan. oops) you'll be fine.
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