Download and install ACF Pro via a bash script – to be used with WP CLI. Set an environemnt variable ACF_KEY first!

install-acf.sh

#!/bin/sh

# Adapted from https://support.advancedcustomfields.com/forums/topic/download-acf-with-wp-cli-on-clean-install/#post-26191

# get plugin path
acf_zip_file="$(wp plugin path)/advanced-custom-fields-pro.zip"

# get acf zip file
wget -O ${acf_zip_file} "https://connect.advancedcustomfields.com/v2/plugins/download?p=pro&k=$ACF_KEY"

# install & activate acf
wp plugin install ${acf_zip_file} --activate

# remove zip file
rm ${acf_zip_file}

@BidmarkBM sorry for the late response, but I've updated the script, URL just needed changing.

Brilliant, thanks - much appreciated!