I've used the repair kit for the drop arm ball joint as couldn't be bothered to change the whole arm.
Everything is included in the kit except the arm itself. Simply undo and note in what order everything comes out in, then put everything in the same order with lube.
isn't it 2 track rod ends on the left hand side (looking towards from) and one on the right?
can't remember which side is which thread, not changed them since i had my lightweight.
Just buy 2 of each, they're cheap enough, then you have one spare for future use.