You'd have to talk to sarah_p though I'm assuming there isn't going to be one because wishlists would have been up by now. There's an email to contact her on the profile page.
Am I interested? Probably not. I did this twice and both times I didn't receive a gift. Then again I seem to have the worst luck with exchanges and that always happens, it's not just here. Though I'd be willing to help if your thinking of setting one up.