Alright, well that's the one I found. Doesn't ship to Canada, but does mean I'm on the right track. My current battery is good for 2:09 at 99%, which.... is just absurd. How long is "forever" by comparison? Trying to decide if it's worth finding a seller to ship to Canada for $200 CAD or not...I recently purchased one form the following link:
https://www.amazon.com/HP-907584-852-Battery-Primary-ZN08092XL-PL/dp/B074VDRW61
$125- Worked perfectly and lasts forever with the FHD (rather than UHD) screen.