The new part number for the copper Motorcrafts is: SP-463
Some Dealers and Parts Stores will be able to cross reference to the old AZF--- number, but if not, use the new one.
I'd also add, that NA cars do extremely well with the Motorcraft copper plugs.
They're cheaper, and provide better spark than the stock platinums.
More often than not when it's time to change plugs, members are using the copper plugs.
As far as openning the gap to .060.
That's generally done when swapping in the Motorcraft copper plugs,
and not neccessarily with the factory platinum plugs.
Openning the gap also goes hand in hand with swapping in better plug wires.