How to get WL 9.x Elements for an old Mac

I’m using an old Macbook (OSX 10.12.6 Sierra) for recording. It works fine with Cubase Elements 9.5. Very well in fact. Now I need to get Wavelab Elements on there. How can I purchase a license for this old version of WLE? …or better still get a trial period activation so I can see if it works first?

When I go to WaveLab: Audio Mastering Software | Steinberg all I see is a way to get WLE 11, but my old Mac isn’t compatable and I can’t for various reasons upgrade to a newer version of Mac OS.

Thanks in advance