Welcome to the forum.  I can't answer your question but there has been several conversations on here about CAI.  A search on here brought up up some threads;
search.php?keywords=cai
You might start by editing your subject line.  The one word "wanted" isn't very descriptive and unlikely to generate much response.  Maybe something like "CAI wanted" or "Where can I buy a CAI?"
Also tell us what year and engine you have, it does make a difference.
Blacking out taillights can be done by using paint specifically made for that purpose.  I wouldn't suggest doing it because it is illegal and dangerous to obstruct the lights.  I don't think anyone makes covers or replacement lenses for the Vibe.  Again the year of your car would help.