Sharingan And Uchiha

There will be No Custom Uchiha, Or Eye transplants such as Kakashi, Or Other things relating to Sharingan. They died and they're eyes have decayed over the years, and the Uchiha are down to the last three.

Plain and Simple, Do not argue with some type of trip to another land or a relative from another village, the Uchiha were segregated so they would all be in the village at the same time.