Because this is an OEM part, you won't find it on Newegg or Amazon. Try these channels:
Below is a technical summary structured as a datasheet/research paper to help you understand the hardware architecture of this device. Technical Overview: Xiaomi Redmi 7A (C3E_MB_V4) 1. System Architecture
, a motherboard for ASUS laptops (i3/i5/i7 configurations) supporting up to 16GB RAM. Technical Documentation: