Flex Plate for 360 Magnum Engine

I have a 2001 5.9 Magnum External balanced engine, I also have a 727 Small block transmission and a Brand New Hughes Torque converter ( NO weights that I can see anywhere on the converter ). I am assuming I will need a Flexplate with some weights as this is an externally balanced engine. Can any of you Mopar guys Please tell me what flex plate will work. I was told by Mancini racing that B and M Does Not make a flex plate Anymore with external weights. NO Need to get all upset here just asking for some help.