However, the Motorcrafts are available from
www.rockauto.com for $2.38 ea. plus shipping. For a 100K mile OEM plug, that ain't bad! I saw a Ford dealer
online selling Motorcraft plugs "wholesale". They were $7.04. Some people don't know the meaning of wholesale!
Edit: I should have said that these plugs are for an '03 with a 5.4L. Someone told me that they list for over $11.