Have recently changed the upper plugs on my 08 4.7. Had a problem finding the plugs at parts stores. Autozone only shows the single plug per cylinder 4.7s. Not available through them. Napa does not offer them either. Oriellys do not have them in stock but can order them. I ordered them through Orielly,s. Upper plugs are OEM Bosch PN FR8TE2 Copper Core. Lower Plugs are OEM Bosh PN FR8T1332 Iridium Core.
Did not have a problem until I got to the very last plug on the left bank in the very back. The rubber coil boot was stuck to the plug. Ended up pulling the boot off of the coil. Had to tear up the boot to get it out. Made a boot from a peice of rubber hose until I found another one. The rubber boots are not available by themselves. You have to buy a complete coil. The coils are available through Dodge and Oreilly,s. Have to be ordered. About 35.00. Take the extra effort to lubricate the rubber boots before reinstalling.
Hope this helps!