Problem getting latest (patch version) of Zimbra 9.0.0

I just upgraded from Zimbra 8.8.15 when I realized I wasn't getting updates (misread and thought I was good through the year)

So I downloaded a copy of Zimbra OSE 9.0.0. from the link emailed by Zextras and when I do I appear to be on a patch version of 14:

rpm -q zimbra-patch gives:  zimbra-patch-9.0.0.1618926120.p14-1.r8.x86_64

How do I get to the latest provided version?  The link when I click to download indicates I should get patch 37.  Is there a way I can manually download patches anywhere?

Thanks