An update...sort of.
Deciding that I wasn't going to rest until I got some answers, I contacted P&G again - this time, with the bar code. It did, in fact, come up as "Bold" in their system...which threw both the CSR and her supervisor for a loop, as both insisted that the product has been discontinued since 2013. There was no explanation for the 2017 copyright date on the package.
They did, however, say a few things.
1: There's no record of it at all in their North American database.
2: This is NOT UK product.
3: It is not a private-label produced for Big Lots, as they do not do such things.
4: If there's a powder, there has to be a liquid.
5: Obviously, since they know nothing about the product, they know nothing about whether it comes in other scents, or even a liquid.
I asked if there was an e-mail address that I could send the photos that I took over to, to see if anyone else might know. They do not have e-mail addresses (apparently, it's an inbound call center).
So...I did the next best thing. I contacted them - with photos - through Facebook. Will probably do Twitter, too.
Stay tuned...