there has been a development.
i said it would take a long time to get the 285/50 -15 P7's made, but i didn't plan on Covid19! I have had this coment from Pirelli
"285/50R15 (104Y) P7 Building proto at the moment. Final product expected towards the end of the year"
This is not garunteeds because obviously there are a variety of things that could go wrong, but it is progress