Actual finds versus plastic

If you go to a museums collections of reconstructed sections of fossils, they usually use an epoxy or plastic (or even aluminum) and the color differences from the natural v the reconstructed segments are easily distinguished.

Smaller fossils, like trilobotes or bryozoans or small fish , are often "cast" ina resin plastic and then painted so they look like the original. Usually these are sold for study purposes and /or are sold in fossil shops and specimen dealers.

Are you looking for an online source or a physical source?