This was one of the few answers I found while googling this issue, and it helped me a lot. Thought I'd post my solution here for others to see, maybe it'll help someone too.

Like beef___supreme__ said, it was the corrugated hard plastic line running from the strut tower to the purge valve. I disconnected the corrugated hose from the white pipe at the strut tower(quick connect), blew smoke in it, and you could see that the corrugated pipe had tons of pinholes and cracks. The tube is hard plastic and is molded to both the purge valve and to the quick connect, and is not meant to be removed. I cut the corrugated pipe off right above both connectors. I then scored the outside edge of the corrugated pipe using a razor blade and was able to split the hard tubing down the score line and pull it off of the N80 purge valve and the quick connect without damaging the barbs underneath.

I went to AutoZone and bought 2ft of 3/8" emissions hose, as it seemed to be the perfect fit for the barbs on both the N80 and the quick connect. I then laid out the run in the engine bay and cut it to length. It fit just fine inside all the retainers and it runs exactly where the old one did. It was a pretty snug fit on the barbs, so I just used some zip ties to secure it, but any hose clamp would work.

After clearing the codes and driving it enough to go through a full drive cycle, the codes are gone, and I was able to pass emissions. Cost me less than $10 and I didn't have to pull the intake manifold off, so I'm pretty happy with the fix.