Are you from the USA? If so, I've managed to find Amazon's MP3 version: https://www.amazon.com/dp/B07N98Y9NZ/ref=dm_rogue_digital. Can't test if it works though since I'm from the UK.

It's weird because Amazon UK lists the MP3 version as an option with the CD, whereas I had to click a link below the options with the US site, which suggests you only get the MP3 version with the purchase of the CD. Not very intuitive I must say