One of the possible techniques to rebuild a spare part that is no longer available is by casting or injection molding.
![iter-stampo-gomma-filtered stampo in apposito silicone](https://www.pennaio.it/wp-content/uploads/2020/04/iter-stampo-gomma-filtered-1-1.jpg)
A special silicone mold processed under a vacuum to avoid internal bubbles
![iter-ricostr-pistone-tib pezzo ottenuto da stampo](https://www.pennaio.it/wp-content/uploads/2020/04/iter-ricostr-pistone-tib-1.jpg)
The yellow colored piece was obtained from the black sample using a casting mold inside an autoclave.