i removed the heater core out of my LX450 and i wanted to make sure i knew what it looked like before i ordered a replacement. well, now that its out..ii cannot find one that matches. all the ones on line dont have any lines coming off the heater core and im not sure why. has anyone bought aftermarket heater cores and did they come with lines? or do they come separate? i dont want to buy an incorrect part and it seems they are discontinued from toyota/lexus. thanks for the help and info!