They *are* available, but if you're looking for a cheap used one in
good shape then be prepared for a long wait and a dose of good luck.
I am in the process of a somewhat foolish refurbishment of a 325iX and
if I've learned anything, then it's that even half-decent front
suspension parts for this car don't come cheap.
You may want to look at the possibility of refurb/repair of the
Motorsforum.com is a website by car enthusiasts for car enthusiasts. It is not affiliated with any of the car or spare part manufacturers or car dealers discussed here.
All logos and trade names are the property of their respective owners.