How to Install OS X Mavericks in 2019

Hello all, let's start with a backstory.

I have a 2011 MacBook Pro. That is irrelevant, but still. It shipped with OS X Lion. I have two partitions on my HDD, one with High Sierra, one with Lion. Okay, now the question.

I am looking to upgrade the Lion partition to Mavericks, because Mavericks has some features I like, such as a working Safari. I was looking around and I cannot find the "Install OS X Mavericks" application on the App Store. Apple's support website only has a link for El Capitan, which leads to the actual question. Where, short of downloading a .dmg from a website, can I find the Mavericks install application?

Regards, Mr. MBP