Sites like DriverScape (1.2.1) and DriverHub (1.2.2) host archived versions of the specific Kaiomy INF files.

KAIOMY Network drivers download for Windows (32/64bit) - DriverHub

If you find the original Kaiomy WA-54P Pro driver package meant for Windows Vista, it will often work on Windows 7 if installed correctly. Step 2: Installation Guide (The Manual Method)

is a 54Mbps 802.11g device, it is often compatible with the chipset drivers. If you cannot find a specific "Kaiomy" branded driver, searching for "Ralink RT2500 Windows 7 driver" may provide a functional alternative.

High-speed wireless networking for desktop PCs.