The ribbon that comes with the main power supply is about 12" long, maybe you could get one of those.
I'm using a Hydra, but the Humi-care is the exact same thing only blue instead of grey.
On my auxillary fans, the ribbon plugs into the main humidifier, and goes to a block. on the other side of the block is a jack for the fan to plug into. The fan is just like a small computer fan with two wires going to it. Is this what you have? You could just splice into the wires and make them longer...