For my 04 4.4i, I bought this in 2019:

https://www.ebay.com/itm/290786378197

Brand new, outstanding seller rating. Has the adjustable bolt that the original N62 alternator didn't have. That made it much easier to install.

I purchased it rather than OE, since the original one failed after ~40k miles. I tried replacing the voltage regulator first with a Valeo from FCP Euro.

It has been solid so far, granted only a few thousand miles since 2019. Just hit 43k.