ADDA AD0412HB-B33 12V DC Brushless Fan 0.22A 40x40x28mm OL0403A
£12
These have a 300mm, 3 way, 5mm pitch white nylon shrouded plug fitted, however they also have a 200mm adaptor lead which changes the original plug to a 6 way (only 3 wires connected) 2.5mm pitch socket, see photographs.