I purchased a pano roof sunshade on amazon. It’s highly rated and works well, but after a couple of weeks, I don’t want to mess with it anymore. I’d like to give it to another M3 owner who is more patient than I am. You can find it here: https://smile.amazon.com/gp/product/B07QNJR94V/ref=ppx_yo_dt_b_asin_title_o02_s01?ie=UTF8&psc=1
Someone in San Jose or who doesn’t mind driving to San Jose would be best.