maybe try researching" boat baffles" on this site
No, that would be the 4" ones for the truck stacks. I was thinking of Mark, at HorseApple. I don't know if he has any, but I would check there first.
http://www.horseapple.com/Valkyrie/Valk_Products/M2W_Exhaust__System/m2w_exhaust__system.htmlIn this case, search is your friend. I would do cobra and baffles, and see what comes up.