you can't buy them. they are made by the bees
the best way to get that hive out is to tear into the wall. otherwise, you are talking about doing a trap out. this leaves you with bees (if you have the right stuff to do the trap out) and no queen. then you have to buy the queen, introduce her,....
read the stuff on cutouts. check with local beekeepers to see if someone is willing to help you out or if there is a local bee club or store that can get you going in the right direction.
i would advise against the beginners kit as it will have stuff you don't want and not enough of what you do. there are some posts about what equipment you need. a search should turn them up.