Mustafa is selling these at $70 each if I'm not wrong. CathayPhoto used to have it for sale but I think they only have sufficient stock for bundling with a particular model of Olympus SLR (IS-30).
I'm suggesting them for the Nikon Coolpix cameras cos of the smaller lens on the Coolpix. This will probably allow the use of a wider zoom range without vignetting. You'll need a step-up ring to 52mm though. If you already have a step up to 43mm, a 43mm-52mm step-up ring could be had for $9 at MS Color in Ang Mo Kio.