Cereform implants are produced by a company located in the North of France. They are not however FDA approved for use here in the U.S. so you need to be very careful should you choose to go that route. If you are U.S. based and a surgeon is offering to use these you should seek another surgeon immediately.
If you are based in Europe, again I caution you to be very careful. The FDA puts medical devices through rigorous testing for safety and if they haven’t been approved yet you are risking your health unnecessarily. Currently only Allergan and Mentor produce implants that have FDA approval and I strongly recommend that only implants that have passed the FDA’s testing should be placed within your body. Consult with a board certified plastic surgeon and remember that safety should always be your biggest priority.