The Energon Pub

I'm trying to customize a few of my figures, and I need to replace some of the Titans Return figures' faces.

Ages ago, I found a blank face 3D model for Titans Return heads, made to edit in 3D modeling software then 3D print, but now that I actually need it, I can't find it anywhere.

Anyone know where I could find something like that? All I can find when I search are various "upgrade kits".