Where to find Official Renders?

Hello! I'm wondering where I can find the various official renders for things like the weapon reveals, particularly those with a transparent background as is used in video thumbnails and the like. For example, the Switch Axe render from Generations as seen on the official Web manual for the game has a background, but there are transparent versions floating around so is there any official or wiki-based source for all these renders? They don't appear on MHwiki or the Fandom version to my knowledge either. If there's a source for similar things on the Frontier side, that would be amazing as well!

Any help is appreciated, thanks!