Late Model Restoration, LMR has been the most consistent and reliable parts vendor I have ever delt with. A.M. and C.J. on the other hand, not so much.
Yea, see if the stealership you purchased from has the previous owners phone number or if they would reach out to the previous owner and ask if he is willing to part with it. Good luck.
I did a search for that chassis number. You've probably already done that, but I don't see your GT350 on here previously. Maybe check out the GT350 page on Facebook. Maybe you will have some luck there. I seriously doubt you will find someone on here willing to part with their supplement...
I did them as one of my first mods along with the G-Trac Brace, all from Steeda. Would recommend if your going to be under your car putting in your own work.
Love the C8 platform. ZO6 will be out of my price range. Still love my 350 as much as the day I drove it off of the showroom floor 3+ years ago, and I prefer to row my own gears.