Wavelab Elements 8 from LE7

Hi, I have purchased Cubase 6/7/8, Halion 3/4, Groove Agent 3/4. Somewhere along the way I got LE 7. I want to upgrade to Elements 8.5 and I don’t have a serial number in the correct format for LE 7. I’ve looked through my software boxes just can’t see where it came from. It might have even been with some DAW hardware I have some vague recollection of that it was a long time ago. Thanks.
Screen Shot 2015-03-07 at 1.45.31 pm.png