I'm looking to upgrade as per the title of the thread, but I'm struggling to source one of the control arms - 31102283576 (TRW). I've found the other 3 on Autodoc (confused as to why identical items on each side are different prices to each other, but that's not important) but the 4th is out of stock (and twice the price of it's mirror image brother on the other side if it was available, for some reason) and the only one I can find anywhere is on eBay from America.
Firstly, am I being stupid? Secondly, depending on the answer to question one, why is one of these parts so much more difficult to find, and more expensive, than the others?
Firstly, am I being stupid? Secondly, depending on the answer to question one, why is one of these parts so much more difficult to find, and more expensive, than the others?