Make three configurations, 1 per accesspoint. That way you can specify a single SSID per accesspoint.
But...why? You are still on the same network (unless client isolation is activated).
What is the purpose? Perhaps the answer is not suitable for your problem...
Yes, but with the three configurations if I wanted to change the wireless password I would have to go to the three configuration independently and change the password for each one.
I already explained that we want a solution for exactly that (not to have to go to each config and change the password one by one as there will be 38 different APs!)
And yes, there will be client isolation all the way down the chain.
Looking at this issue, it seems to me that the only way to achieve this is to make different config for each AP and then to use a script to make a mass update of the AP configs wireless password.
Just was hoping someone could confirm possible solutions before I invest time doing it 'my way' as obviously there may be a straight forward way to do this without using scripts that I am not grasping.