I used to wonder about this and still do sometimes. Our school special ed director/educational psychologist, teachers, and the principal (a relative of mine who knew my son) all told me they had never seen a kid like mine and since it was a small town school they couldn't do anything for him. My special ed teacher friend and mother of two of my son's gifted friends told me there was a child several years younger in the school now that reminds her a little of my son.
I think my son understood even before I did that it wasn't likely that he would find another kid like him, but I think he secretly hoped he would. He wanted me to post things about his abilities and disabilities and I think it was because he wanted to know if there are others out there like him. I did find a few, and I read those posts to him, but it was usually younger kids, and people on this board have suggested reading materials about gifted people with disabilities and this has been very helpful.
I think my son's combination of gifted with a mild disability, a hidden disability not noticeable to most people, does make him rare, but it has also given him a rare opportunity to see things from a different perspective, made him seem more mature because he has thought about things that most kids his age don't have to think about, and has left him with a rare ability to keep a sense of humor and not only laugh, but make others laugh with him when things are difficult.
A few years ago he described his body as a Model T and said he was trying to race with race cars with much better handling packages. His Model T gets him where he needs to go and some people collect them because they are rare.