This is partially self-serving, as someone who's making up 3D Printed Parts for Thirdgens, but I'd like to invite everyone doing the same to post what you've got in this thread. I know there's some radio bezels, cup holders, trim screws, etc. floating around out there. Maybe one place for everything. See part #'s and photos below for what I've got completed:

GM #10051002 - Door Rod Retainer
GM #20096585 - Window Retainer
GM #20146473 - Glass Stabilizer Button
GM #20206202 - Handle Insert
GM #20216825 - Front Up Stop
GM #20562754 - Window Bushing
And probably a few weeks away from having some functional replacements for the Strut Dust Boots. Chime on in, fellow printers.