I'd look to www.samsungparts.com and shopjimmy.com Here's a video on what you see most of the time.

The ones that got replaced were the early failures. Today we should be seeing them fail daily as they get into the expected failure rate. I have a Ti document showing these won't last too many years so it's a shame that all this wasn't shared early so consumers didn't get any idea this was supposed to last as long as our old sets.