I am a dealer for KLM. I have a brand new 6 port kit with a 7275 Next Gen in stock and ready to ship if that helps you. The typical lead time for the manifolds is 4 - 8 weeks.
I've been bothered by a very similar sounding noise coming from the rear hatch area too. I believe its the metal shroud above the muffler area too... There's so many places where its metal on metal.
The tire does look poked out. You're not running any kind of wheel spacer are you? I have 275/35/19 on a Advan GT Beyond - 19x9.5 +25 and do not rub at all. I'm on HKS coil overs and lowered a little more than you....