There are some twin bed options still available, such as these:
https://www.thormotorcoach.com/axis/floor-plans/241/https://www.thormotorcoach.com/fourwinds/floor-plans/25VBut they don't check the other boxes... One option might be to start with something like this:
https://www.thormotorcoach.com/fourwinds/floor-plans/28AAnd do an aftermarket mod...
Or this:
https://www.gulfstreamcoach.com/products/motorhomes/conquestclassc/model/6280leWhich I've seen available as a rental with 4 bunk beds in the back instead of the queen, so could possibly be ordered with twin beds.
I'm not sure that any of those come with two ACs though, so that would be an aftermarket mod.