Idler Arm Failure

Since heat from the nearby header is the likely root cause of the failure, can’t you simply rig up a heat shield or use a heat containing coating or wrap on the section of header nearby ?

And FWIIW, I had a leaking power steering pump that I thought that I bought from AZ in about 2010, they looked it up in the store records and confirmed that I had purchased the pump in 2007 and honored the warranty without issue.
And I am currently going through a warranty replacement with Rockauto, follow the on line instructions, for this one also I did not need the original receipt, the records were online.