Does anybody have a P75? If so, what sort of cooler have you got on it?

I ask because I've had a hard time finding a cooler which fits the board properly. It's a Socket 5, but the retaining clips are offset from oneanother, meaning it needs the Z-shaped retaining wire clip, rather than the straight over type found on the Socket 7 coolers. Socket 7 coolers are incredibly easy to find, but not so their Socket 5 predecessors.

Right now I've got a bent bit of metal (actually a piece of N-Gauge model rail track!) holding it on, but the cooler has a tendency to wander now and then. My research suggests the CPU only outputs 8W, and either could be passively cooled, or could possibly cope with no heatsink at all. I do recall a lot of early Pentiums having just a passive heatsink, but they had the Z-clip retainer, which I can't find. My concern is the heatsink falling off when I don't notice, and I kill the CPU (this CPU of course pre-dating clever thermal controls).

Does anybody know of a good source of heatsinks or clips? Or am I safe with my bodge fix?