This list is currently very limited and acts as my own (Sleepy) database as I explore the ecosystem more.
https://consensys.net/diligence/blog/2022/01/under-constrained-computation-a-new-kind-of-bug/ https://blog.trailofbits.com/2022/04/20/amarna-static-analysis-for-cairo-programs/
https://github.com/crytic/amarna
https://twitter.com/joranhonig
The following firms are either capable of offering Cairo security reviews or tasked with developing the security ecosystem. Don't hesitate to reach out to any of them on their respective sites with requests of that nature. You'll learn a lot reading through their audit reports as well.