Warhammer 40K

Does anyone know of any good Stompa model floating around?

I tried finding some space bug models that were super awesome on Cult, but they've been taken down. The ones I'm looking for are:
Spelt this way on purpose for reasons.
Wariors
Gargoils
Trigon
Mahlock
Terdigon
Malisepter
Toxycrean
good wings for tyran

https://www.thingiverse.com/thing:4787645
Please check the attached image
https://patreon.com/renan3dstls

Hi, I tried several methods like mold and fill on tinkercad, meshmixers seems to not find any errors for fixing this.
Any masters would like to help ?

tldr; I tried to fill thin walls models but I'm lack of skills and experience, need help and guidance.

https://www.thingiverse.com/thing:3926756

Does anyone have these files? They are already 404'd

https://www.thingiverse.com/jonethealliance/designs