I believe I have one, still on the car. It was on the car when I bought it. I have plans to install another muffler though the car isn't working in order to get it to a shop. Where are you located? I'm in Santa Maria CA.
2010 Grey MX-5 GT, 6-speed Manual, Sport Package, Roadstersport Street Single w/Baffle, FCM Coilovers - "GT" setup with KBO & Ripple Reducer, Enkei 17x7.5 wheels, Goodwin Underbody Braces, Cravenspeed Shift Knob