Check out Tim's instagram page at 3d_printing_innovation where you can keep up-to-date with him and his prints!
Check out Derrick's instagram page at No Coast Engineering where you can keep up-to-date with him and his prints. He also has a link to his business there too so you can buy a cool print directly from him.
Check out David's instagram page at Lord_of_the_print where you can check out all the 3D printing he does. On his page he also has work from zbrush and information on how you can support him through patreon or how you can buy prints from him directly!