Mojave 10.14 download

My mid 2012 MAC PRO...finally able to install a new metal compatible graphics card and now want to upgrade from High Sierra...to Mojave (the highest OS I can upgrade to) but ony find 10.14.1 which requires 10.14....Really a problem doing something simple....Used to be able to install any OS to a new clean drive and run different OS depending on the software running....should be readily available for a fresh install of any +OS. wary of some of these 3rd party download sites.