I just tried to remove the tail-light from a 2007 Toyota Yaris - bloody nearly impossible to do, a real PITA - so - here's my solution :-
Geoffs-Yaris-T10-Taillight-Spanner.stl.
It's not perfect, but it does work OK - the hardest part is getting the fingers into the (nearly impossible to see) groove on the tail-light plastic clip. Luckily, getting it back in is much easier.
I made it a tight fit (you can see the slight bend in the fingers), so the light doesn't fall out on reassembly.
