For any serious WiFI AP replacement, I would need cutouts for 5 SMA (say using WLE200NX and WLE900VX). I know I can drill holes myself I know how it usually ends up compared to perfect and clean factory placement.
Another option would be using the WLE600VX (instead of WLE900VX) and use antennas for both 2.4 and 5 GHz. But that would require signal mixers/diplexers. I have no idea where one could purchase these but guys from Turris use them and the design is open source so maybe some one could manufacture them ;-).