I don't know if this is helpful but about a year ago I went to a parelli demo and were dealing with a similar problem. My horse didn't rear but used to throw his head up and turn his ass to me in his stable. I used this parelli technique and now i can put his bridle on in and out of the stable not tied up standing to the side or infront of him. He just takes the bit in his mouth without any interference from me.
Anyway, the idea is to make it a game for them and for them to see the bridle and putting it on is play time. Get the bridle and rub is all over their body and face, all up in their forelock and ears, everywhere and use it how its not meant to be used. Do it till you're horse is curious about this thing your doing to them and then offer them the bit, if she doesn't take it, don't persist but go straight back to the rubbing game. Repeat until she's bored of you rubbing it all over her head and just wants it in her mouth. I did this for a couple of months. It also helps you bond with your new horse.