Wanted Rear Testarossa Tires/ Replacement Wheels

Hi all my fellow Testarossa owners,

After doing research on this forum as well as across the internet, I've come to the conclusion that the Michelin TRX 280/45VR415 tires (for the rear wheels on my 85 TR) are no longer in production. I'm currently looking for even a used set, for purposes of show and display. Otherwise, it is my understanding that alternative 16" wheels exist that accommodate tires that are currently in production. Any information or knowledge of where to find used metric sized tires, or what actually works and looks look insofar as a replacement wheel would be greatly appreciated! Just looking to keep the great factory look of my car for shows etc.

Thank you! This is my first FerrariChat post, excited to be here!