I have been trying to get a different cooling head also, Acncm seems to be the popular choice on here but getting one outside of the US region seems tricky, I am in the UK and have sent several emails which have been ignored.
Can anyone recommend a different engine head, I have been looking at the one from Nova RC Here
the only other one I have seen that looks ok is the Golden Horizon one from tower Here
anyone used either of these that could recommend them ?