Thanks to everyone that replied to the original post.
I found a 1/2" 20v Craftsman drill with battery and charger, that gives me 5 batteries and 4 chargers, on sale at Lowes for $59 and ordered an adaptor from amazon for $33. As much as I would've liked to get the clam shell plate it was out of my price range as I don't have a 1/2" battery drill and would have to buy the drill too.
This is what I ordered from amazon. [log in for link]