Hello,
As you, I don’t understand why the Sation "Aiguille du Midi " has not included in the UW4 !
You may be pleased to know that sombody called AdrienL has build a free addon of all the valley. Search Chamonix-Mont-Blanc Valley on free addon sites.
But the addon has been released at the beginning of this month, before the UW4 and now it need to be patched.