Welcome to the type of discrimination everyone is okay with. I'm saddened to hear of your difficulties, but it sounds about par for the course given my life experience.

The fact is, it's extremely difficult to find people who are cutting edge teachers of young minds. You can get them advanced course material and work with your child as long as your mind can keep up, but when it comes to outsourcing it or finding a mentor for pedagogy, if you don't know somebody, all you can really do is do the footwork, network, and pray to cross paths with someone who fits the bill.

The curse of course being that someone with advanced understanding isn't actually who you are looking for, but someone exceptionally good at teaching how to build understanding of complex topics. Those people will be in high demand, everyone will claim to be one, and a bad choice on your part distinguishing the frauds from the real thing could do much more harm than good.

Good luck. If it were me, I'd just try to get in as much extracurricular time as possible, or network with the type of people who could help, which you're already doing; so...