I am using this fan/heatsink combination on my Cyberstorm Mk2 060 running at 66 Mhz:
This is 45 by 45 mm wide, and its height is only 7.5mm. It sucks air from the top, blows it thru the integrated aluminum heatsink, while the output is located only at the rear edge, pointing towards the lower quarter of the ps fan, thus a defined airstream is generated for the CPU. My full MC68060RC50 rev. 6 is running 66 Mhz without any problems using that setup in my A3k desktop. If needed, this fan/heatsink can be purchased thru me.
