ha ha.. yes Napa or other parts stores can get you these.... I used to have a couple of them but left them in inventory when I sold the shop...
Just make sure the one you get doesn't have baffles in it, or it will flow worse than the stock resonator.
Talk to Jeremy (deride). He want's to cut one or more of the resonators out of the T-leg exhaust. I don't know if you saw the ones I sold pete, but they are identical to what Jeremy has on his car.