The inlays for the eyes and mouth are compatible with:

Textured Minecraft Creeper with Moveable Head by Walpeup [https://www.thingiverse.com/thing:1116836](https://www.thingiverse.com/thing:1116836)

The eye and mouth are very similar, but have a much tighter fit. No glue required. Just push them in gently.

Minecraft Creeper Eye and Mouth Only by thinkcreate [https://www.thingiverse.com/thing:2584987](https://www.thingiverse.com/thing:2584987)