Hi Spark6, I'm using the Arctic Cooling Copper Silent 2 Tc, but its listed as being on 5 days delivery click here. It's working well and is very quiet. The Coolermaster range is also good, but not as quiet, e.g. click here, but this is listed as being on 14 days delivery.
This one looks good, is said to be in stock and is reputed to be quiet click here. The good thing about a fairly modest processor such as the Duron 1600 is that it isn't difficult to keep reasonably cool.
Oh, and by the way, the last time I looked, I was definitely a he.