If you'd like to special order a 9mm Wilson, feel free to give us a shout and make arrangements. Due to demand, we tend to order primarily .45ACPs for store inventory -- and the guns we order for store inventory are overwhelmingly likely to get bought up by preorders long before they're finished and shipped by customers looking to shave a few months from their wait time, so even the .45ACPs we order rarely make it to the shelf. What guns we order in other calibers, such as the 10mm Hunters, for store stock are literally purchased out from under us every single time. The even rarer 9mm pistols would follow that same pattern.
For scarce items like this, you're always best off ensuring there's a gun for you by ordering it specifically. Your name is appended to the PO for that pistol from start to finish and it's never a game of odds.
Cheers,
Daniel