How close to the trunk are they? If there are a foot or more I would use a sharp spade to sever the connection to the main tree and then leave it a lone for a few months and let the now independent tree grow some more roots before digging it out and transplanting late winter/early spring.

I'm assuming your tree is grafted and what you'll get is another rootstock ready to be grafted.

Thanks, murky. That's an interesting idea and I will definately try it. I know Motmorency does not need cross polinator, but I sure cannot pass a chance of getting a second tree for FREE