Where to get AC Unit?? for my b16a..

When I bought my crx, it didnt have air condition with the b16a drop. Its an 89 Si. The original engine DID have it, because the controls are on the interior. I need to know what parts I need to hook all of this up. In my engine bay, there are wires and plugs for it. Is there any websites that I can buy from, that sell it all in a package? Where should I look? Right now I dont that much money, so I need some help please.