I must revise my comment here. If your AD radio is of the earlier model, the one with the back cut on a slant, the speaker from Walmart will fit inside, with a little tweaking of the connection terminal block. If it is the newer version with the straight back, the speaker will not fit. If you want to use a speaker mounted outside of the radio, a low power 4 to 8 ohm speaker will do. Those radios do not have a lot of extra output power to spare.
