There is one thing that to me would garentee it as sandman that i cant see anyone has mentioned.

Being a ute. A genuine twin headlight front ute was only available with the XX7 or XU3 package as B06 was not available on utes.

Does it have a little inline fuse behind the wiper motor and brake booster? On a red wire. The red wire will come out of the harness. Then the fuse then back into the harness.

If so its a true twin front ute. No one would go to the effort of fitting this loom to a non genuine twin front ute.

If it has this fuse and with all the other info shown. There is 100% no doubts in my mind its XX7

Cheers
Jason