I have broken an LS400, and I am breaking another, getting the rack off is not the end of the world. Not easy, but very do-able. Just takes a bit of time and effort...... which is probably why a stealer would charge a lot of labour to do it.
Mine is a MK-3, so I dont know if it would fit your year.
Have a look on LEXLS, there could be some good information there.