I have a few sets available. First person to buy a set will get them for $80 shipped. The only condition that I ask is that the buyer posts up a review after installation.
Edit for guys asking purpose: These visors are mostly for looks, they also make a unique visual upgrade. I think they would keep the rain off of them too but I haven't been able to test them out in the rain yet. (It hasn't rained in TX since I put them on my car.) Nissan offered OEM mirror visors in Japan for S13s as a cool factory option.