Which NB-cooler with xp120?

Anyone an idea which nb heatsink would fit with a thermalright xp120 on an ic7? Would a thermalright nb-(c) fit without the cooler? Will it cool enough without a fan on top of it?

I'm actually using the orb heatsink without the fan (it died) but at 275fsb it gets to hot and games crash after some time even with the airflow of the 120mm fan on the xp 120.

I use the NorthPole chipset Cooler with my sp-94. Here is a link http://www.frozencpu.com/cgi-bin/frozencpu/vid-26.html
I know the xp120 is a big cooler it might fit under it.

I'm afraid that won't fit I'll try epoxying a zalman nb47j on the northbridge, hope it will fit and cool enough