Custom Firmware for Tp-Link WR720N v1

I Was unable to find a firmware suitable for my old router TP-WR720N Version 1. Any supporters who have setup success for this model. Help me out.. I am new here...

TL-WR720N v1 has only 2MB flash / 16MB RAM -> unsupportable

See https://openwrt.org/supported_devices/432_warning