These POE tactics of yours ignore most every other branch of science including biological studies on fossils, it isn't just paleontologists digging up bones and going " oh look what I can piece together". Many other fields of study corroborate the nature of the findings.if you did any casting you would know that you can create every fine detail of an skeleton. I suggest you post a picture of your so called enclosed chamber and microscopic detail you are referring to. A mold casting can create everything outside and inside the skeleton if their are even if their are holes in the skeleton. Wet sand stone casting can produce a well detailed smooth texture.
If you are so sure then make yourself rich and sell some of those alleged castings to some major university or museum.
The funnier part is your saying replicas are being made, that means the real thing exists in order to cast a copy of it. This thread is a huge strawman.