this is what im afraid of. I had it originally with the original factory cat but it's since fallen off and I have an aftermarket cat that does not include that piece.My reading of the various mopar part catalogs online is that part #9 is a subcomponent of part#2 and only sold with the whole assembly.
I.e. if you bought a cheaper aftermarket cat and manifold combo, you needed to strip everything off the original to make use of it. My guess is this will be expensive if your local dealer's parts counter can't get you the specific bit.