Not .stl files but lots of stuff 3D printed already:
3D printed radio brackets, FJ60 replacement switch bezel, USB plugs for said switch bezel among other things:
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Aftermarket parts for your Toyota Land Cruiser Here at Cruiser Head Parts custom reproduction modification hardware FJ60 FJ62 4runner aftermarket fj60 solutions FJ70 70 catalog cruiserhead.com cruiserheads cruiserheadparts store shop automotive panel switch bezel surround 3d print printed gauge...
cruiserhead.com
3D printed cup holder among other things:
www.bh3dprinting.com
Several members make various 3D printed things. Got some 3D printed door speaker spacer/adapters which will likely help you with your door speaker install to keep the windows rolling up and down and not have the regulator inside the door hit your aftermarket speaker. Member
@TheNeek makes these. May make other things as well.
Edit: I see you already cut into the door for speakers. Nvm on the spacers then. Whoever you sell that truck to will thank you later.
A few I know about. HTH.