When I contacted Lexus Parts Direct I was quoted £1,114 for a pair of front UCA's, so I went for a pair from Rockauto which cost £93 including parts, taxes and shipping. I also bought lower control arms with new bushings and lower ball joints. These weren't the cheapest they had, I was going by reviews. I understand the concerns over aftermarket but you can tell by the quality of the casting these are good parts, plus CNC machining. I also know about the suing culture in the US so that gives me more confidence when buying from them as opposed to an unknown seller on eBay. I also know that Moog (the parts manufacturer) has a good reputation. It's a really easy job to fit all of these parts as well, they just need torquing correctly.