a 5V source for an extra fan in T61?

[xirtyllo]

I would like to embark in a T61 cooling mod, mainly for fun

I am thinking to put one of these mini fans (http://www.ebay.co.uk/itm/2-PCS-New-Sun ... 2581ec6f2b)
inside my T61...

I think that the empty space of the second mini-pci slot would be an ideal location.

now the problem... where could I connect the new fan to get electricity?

I don't use the modem... anywhere I could hook up there?