Regrets, no solution for you. I tried to push TP-LINK 500G/501G/5110G/5210G to run on non-standard channels on 2.3GHz band but with no success. Try UBNT NS 2.4, work great if you set compliance test mode with scan list enabled or korea republic2 selection. Of course, if you are able to do that in your country due to regulatory policies.
"Your chances of success in any undertaking can always be measured by your belief in yourself". - Robert Collier