Like many amateur pastry chefs I love watching Amaury Guichon.
There is a tool that he and other pastry chefs use very frequently that I'm completely unable to find. One clear example is his famous coconut: https://fb.watch/2IjsP0vpox/
You can see as he makes the core of the coconut he uses a series of spherical molds with different materials to form the center. I don't care particularly much about the spherical piece, but my mind is entranced with the idea of multi-stage molds.
Unfortunately it appears that these devices are impossible to google for or find. What are these progressive molds called? Are these publicly available or something special that Amaury made for himself?