To my knowledge, Stage V and Indy Cylinder heads were the only two doing it with any regularity/success. They're both good quality stuff. As you probably noted, the Stage V site says "under construction August 2001". Obviously they don't get what the internet is about. You'll probably have to call them on the phone to get any info.

The article Mike linked to is the best info I've seen over the years, right down to a pretty accurate price listing, although you're not going to find a dual quad Hemi intake that cheap anymore.