Can custom cheek implants give width and structure to the upper face?

Yes. There is a variety of shapes and sizes available so custom made implants are rarely needed. In-service evaluation with a board certified plastic surgeon would help. Good luck.

The value of custom cheek implants is that they create augmentation effects that exceed what standard cheek implants can do. This is most manifest in the zygomatic arch area, both in extension and width. This may be what you are referring to by adding structure to the uoper face.