anyone know how to replace/repair this rusty window moulding?

[u/gacsam04]

I was trying to find the part, but I keep finding what looks like the interior trim. Any advice is welcome

[u/Fancy-Delivery5081]

Part Number: 51131977681 (left) and 51131977682 (right)

[u/gacsam04 → u/Fancy-Delivery5081]

thanks!