my driver's side windshield trim decided to fly away so i figured no big deal it can't be very expensive
well guess what it's $100 plus shipping!!!

https://www.acurapartswarehouse.com/...indshield.html

sorry but i'm not paying that much for some plastic bits.
was thinking of cutting up a piece of black plastic but then ran across this 3m stuff:

https://www.ebay.com/itm/165403020618

haven't got it yet but looks to be a perfect fit. will update when it arrives.
the upper trim piece is only $27 so i guess you could cut that to size and fab the corner piece.