Hello team -

New to KDE, Been a gnome guy for a long time - But thought I'd come over to this side of things to check it out.

Where can I download the LATEST version of kmail, kontact etc.... as I know there are sometimes newer versions available not part of the disty version.
Been looking, and lots of the links I see are years old... so I'm sure there's updated links. I've looked here but can't see anything.
Maybe I need more coffee? I scrolled right past it?

You haven't explicitly implied what platform you wish to do this from...

IF you have KDE installed--Kubuntu or Neon--then use Discover or Muon or pkcon

IF you have some other DE--like Xfce--do a package search...
eg. https://packages.ubuntu.com/search?keywords=search
you can replace "keywords=search" with your own keyword, like "keywords=kde-plasma-desktop"

Hope that helps you...