Cubase PRO 11.0.30 for Mac?

I’m looking for a 11.0.30 version of Mac Cubase PRO, since the 11.0.40 doesn’t work on High Sierra. I don’t want to change OS . I can’t find it on Steinberg site, and the support isn’t responding for a week.
Does someone know how to proceed ?
Have a good day, Stef, from France