FNAFSTINE 3-D has been uploaded to this page earlier today, check it out if you haven't yet

Purpleman's Funhouse's old thumbnail

Michael Afton's prison ( immortality and machines )

old art for purpleman's funhouse bloodbath featuring a doodle of bonnie(?), Chief Springtrap, Funhouse Chica, and William Afton

the grön model is real

Elizabeth Afton's drawings that were going to be featured in the cancelled purpleman's funhouse bloodbath game

Elizabeth Afton's Clock (BLOODBATH teaser)

sprite of the unused Billy character from the original 2020 funhouse

old artwork featuring purple man and billy (for the point and click version of the game)

The Thumbnail and Banner for FNAFSTINE 2600 have been found (thank you @Spongebobguy2 )