Complete Maples EGR Throttle for Cox GTP Nissan

I have a Cox GTP Nissan with the exhaust ring throttle style and I would like to convert it to the Maples EGR type throttle. I am hoping someone may have these parts for sale. I would want all parts required to make the full switch which I believe includes the vertical, plastic, rectangular intake stack, aluminum throttle body that mounts on top of the fuel tank, and also some sort of exhaust ring that replaces the adjustable one I have now. Any other parts that make up this system. If you have any information on where I could look, that would be greatly appreciated. Thank you.