It took me a while, but I have the remaining two I needed to get.
They're up on Pokecheck, and they cleared the legal check from my end, you can check them yourselves, if you feel you need to.
Thundurus: https://www.pokecheck.org/?p=detail&uid=4676891
Landorus: https://www.pokecheck.org/?p=detail&uid=4676889
One thing I have noticed, though, is that the previous one seems to be at level 10, while these two are at level 20. I don't know if it's a change due to localisation.