Where Can I Find An Intake Manifold For A Honda Civic 1996

I am looking for an intake manifold for a Honda Civic 1996, D15Z6, LSi, 1500, EK3, KA5MT, 6Cylinder, 1.5L ABS engine, VTEC First Generation Japan Motor 4 door sedan Fuel Injected. The manifold will be a unique one, not a standard one. I need it asap. New or Used and/or reconditioned is fine. I welcome web sites that definitely have it and also auto parts places, really anything and worldwide is fine. Thank you for all your help. Everyone have a fantastic day!
Hoda Civic, 1996 First Generation Japan VTEC, D15z6, LSi, EK3, KA5MT, 1.5L ABS.
Intake Manifold needs to have a SWIRL CHAMBER in it. This is a 6 cylinder car. I know most came as a 4 cylinder but, the person this is for should know as he is the owner and a mechanical engineer who has worked quite a lot on his car. I would appreciate getting actual websites and dealerships that would carry this part. I need quality. I also need it as soon as possible.Thank you.
Correction: it is a 4 not a 6 cylinder. I misheard when it was dictated. Sorry. I would really like for someone to give me actual websites and source information.
I have an additional question: If I fit the Skunk2 Performance Manifold, how do I eliminate the EGR Valve Sensor PGM fault as it won’t be plugged in when I change the manifold?