I have the enclosure with the original ML sub. FYI I still have the stock factory stereo and I put in a Bazooka WF641.5 DV in the old subs place. The box and panel just have to be adjusted to fit...it sounds better than OEM imo. Send me a message if you want to old SUB.
Did you ever find a solution to this? My 2001 LX470 has a bad amp. Everything else is still working....the amp actually comes on occasionally, but I can tell its dying.