Welcome to the forum.
Well the elite in 9mm is a very sought after gun. That ever so often come up for sale. And when they do expect to pay $$$$.
Some options to purchase: WTB ad here (WTB section), Gunbroker (stalk it and look for one), call Hk and order a 9mm elite conversion kit for the Usp 45, or find an importer to procure and import one for you.
Those are a few options. Other could chime in more but just getting you started