Does anyone know if it's possible to retrofit pre-2000 MLs with the LATCH restraint system for car seats? I'm guessing that the 2000 and later seats are a whole different animal since they're 60/40 split verses the earlier 33/33/33 arrangement, but I don't know if the inclusion of the LATCH anchors played a role in that change. Does anyone make a LATCH kit for earlier MLs?