Due to a bug in CE 2.1+ (See Here, I am trying to replace a core Magento file:
\vendor\magento\module-catalog\Pricing\Render\FinalPriceBox.php
with my own version. However, I have tried inserting this into several different existing theme locations and it doesn't get picked up.
How can I replace this core file with my own version (You can see what I did in the above linked github thread).
Any help is appreciated.