The majority of the time when one suspension piece starts to fail the associated parts are on their way out as well. Should check closely so that you address anything else while it is torn down especially if you aren't doing your own work.

Not unusual for an owner to replace the parts that are easiest to do and not replace the ball joints and swing arm bushings that require more work and disassembly. Not difficult job as long as you have the right tools. I purchased some of the parts I needed from ECS Tuning but I think FCPEuro also stocked the parts. Mine is lowered and has 18mm spacers. I can get within the negative camber specs without aftermarket options to help.

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X5 4.6 2002 Black Sap, Black interior. 2013 X5M Melbourne Red, Bamboo interior
Dallas