US or Canada? You might try either the Far North Forum or the fruit forum.

hardyfruittrees.ca?

Canada, ok will try Far North, :)

Try T+T seeds. They have apples and 4 varieties of grapes, haskap berries and other fruit that were tested on the prairies. You will find that most fruit trees are fairly expensive. Part of the cost is the length of time it takes to grow them before they can sell them