tq745

i recently just purchased a 2001 ul ls430. the sub is blown and the passenger side speaker is blown. i researched and found some replacing the sub with a 4 ohm jlw0 which worked fine. can anyone give me some info on what type of speaker i should be looking for the door speaker? and any other type of sub that would be better fitted for the ls other than the ML sub. I don't want to get it replaced by the dealer because i know they'll want my arm and a leg from me. thanks in advance.