Oops.
Yes there are:
Angle Of Attack Indicators from Aircraft Spruce
I think it's a safe bet that these accessory AoA systems do not take into account config. changes, so I imagine you can set them up to indicate correctly in whatever config. you like best, but only one.
As Genghis says, If they become a popular accessory, we will need to establish conventions for what the best config. for that would be, and I imagine that most would agree that calibration in the 'clean' config. would probably offer the safest compromise, in most cases.
MJ
