Unless, her 'Allergy Specialist" has in fact tested 'specifically' for the dust provided by a MAC, its little more than an educated guess.
There are a ton of things that can be done to clean the air in your home.
That all said, if your goal is to sell the parrot. Yes, there are places. The first place to start is your Avian Vet. I recommend you contact your Avian Clinic First.