Not sure if this is the right place to put this, but I just checked Flyin' Miata's deal-of-the-day and thought some people on here might be interested. They're 1.6 Turbo manifolds from a previous supplier for just $150:

http://www.flyinmiata.com/dealoftheday/index.php

I thought about picking one up myself, but I have no idea when/if I'll get the chance to go turbo.