DanaWell is the most experienced company in the field of producing custom-made polymer prostheses, having performed over 250 successful surgeries to date.

The material of Danawell’s custom prosthesis is polymer, as stated on the relevant page, and sufficient explanation is given on the relevant page.

For the price of a custom skull prosthesis, see this page.
The process of sending, preparing, and personalizing a custom skull prosthesis is fully explained on this page.