Anyone got a small (40mm) fan kicking around?

[Feek]

I want to cool my Northbridge a little bit but I'm not sure if the current heatsink is glued in place or not and I have very little clearance between it and the CPU cooler:



(yes, I know the cable is untidy, it'll be sorted when I put a fan in place)

I want to mount a small fan, no bigger than 40mm x 40mm to the heatsink itself, probably by forcing screws through the vanes!

Anyone got a small suitable fan that they're not using? If I buy one, it's costing as much for the postage as it is for the fan itself and that seems silly.