I succeeded in fabricating just the hooks for the side rear window sunshades.
i used 3D printing technology. It seems you can just buy new hooks from lexus without purchasing
the entire garnish which costs about $200 per side. A pretty hefty repair cost just to replace a plastic hook.
Heres a couple pics... the 3D copy is the grey one in the pictures. Lemme know what you think. All i have to do now is drill a couple small holes for the screws.