Wanted: Searching for 5.56 barrel with fsb

As title states I'm searching for a 5.56 barrel with a fsb that is pinned. Ideally I'd like a 20 inch or 18inch and would like a cold hammer forged  barrel. Would even consider purchasing an .750 f marked fsb with pins if anyone has one for sale to have installed on my current barrel. Not looking to spend a fortune because at that rate I may as import one.  PICTURE FOR REFERENCE.

Thanks gentlemen!