I'm looking for that "Special" apple tree to get b

[peabody]

I've had some sucess grafting apple trees. Next Spring, I'd like to do a bunch more. Besides the old varieties that are available, I'd like to try some budstock from old un-named trees that can produce good tasting medium to large apples, without the need for sprays. If you know of just such an apple tree, I'd like to hear from you. I don't want modern commercial varieties. I don't want older known varieties. Something different, one of a kind sort of thing. I live in a cold region and would be able to test for cold hardyness. I would be willing to swap budstock for budstock from your favorite unknown.