Hi Guys - I've got to replace my clutch and I my old jack is about dead. So, I'm going to buy new jack and some more stands. How tall do I need to get so that I can safely drop the transmission (manual)? I'd like to be able to drop it with low profile transmission jack, so I don't drop it on...

I have an '02 E46. I am trying to get the tools I'll need to replace my lower control arm bushings, as seen here. However, the stands I have are meant for every other car, where they can just sit under the frame somewhere. Where can I find either stands with the BMW jack point square...