They do, but the gearboxes in the tracks don't. They're made from questionable plastic and they break. Both the seats in my 90 don't work when it comes to 6 way power, the boxes grind and no one sells them separately. Only rebuilt tracks for crazy money (someone apparently has nos or new gearboxes to rebuild the cores with...but isn't selling to the public)
If the lumbar pump craps out, it's usually the diaphragm. A 50 cent pair of rubber gloves will be all you need to fix them (cut new diaphragms out of)