Well let me ask you a question real quick. do you plan on driving in the rain? If you do just get a regular intake or just swap out to a pop filter and keep all of your original plumbing.
There are numerous debates, but a CAI is hardly worth the money/hp. There are several other things you should consider before a intake. Unless you are just going for the look.
There are several on Ebay just don't look for SR20DE. Only type SR20. You will even find top brands like DC, Apexi, HKS, etc... with "SR20".