yellow apples everywhere and all i need is red..

I am currently working on a spell that rids your aura of impurities and any bad spirits that I may have picked up through meditation or psychic channeling. The spell calls for tea made from the root of a mountain ash and an apple tree that bares red fruit. I have located the mountain ash but can't find a red apple tree anywhere. My yard is full of green and yellow apples but it never occurred to me to plant red. Does anyone know where I could find a root or do u have one I could buy or trade for? I would be much in ur debt. Blessed be. Fayodora