But .... forum member Aberdeen Scoot posted his 2015 factory windscreen replacement here. And his P/N (08R70-K35-D00) was one number closer to matching the P/N from Webike. I began to wonder if Honda gives the same part different numbers based on intended country of sale?
Now, Webike's website says "This item can not be cancelled, returned nor exchange after placing an order." Scary stuff, considering the uncertainty of fitting my 2015. Add to that their hefty $56 shipping fee, & I started thinking twice about whether or not it was worth the risk. But a few more days of riding my PCX convinced me that I had to get some kind of windscreen. So, I emailed Webike & asked if their windscreen did, in fact, fit my 2015 PCX. After a day or two, I got an email back saying yes, it did. :-) But wait -- Aberdeen Scoot mentioned brackets, bolts, & mirror mounts. I emailed Webike again. Yes, the windscreen comes with all necessary mounting hardware! With some uncertainty still lingering, I placed my order late last Sunday night ....
The windscreen arrived this Saturday morning, less than 6 full days after placing my order!

I already had plans for the day, but when I got home I was ready to install my new screen. Working very carefully (since I still wasn't sure if it would fit my 2015 scoot), it took me a little over an hour to fit. That included finding online instructions, pre-fitting the screen, adjusting the mounting brackets to flush-fit the scoot, & prepping all of the bolt threads with either Loc-tite or oil (depending on their placement).
The result is -- it fits!

It was too late to get pictures or take it for test ride, so that'll be tomorrow's mission!
The important thing is, if you really want a Honda OE tall windscreen for your 2015 PCX but don't want to spend $300+, Webike.com can get you one for right around $200, & have it at your door in less than a week.