The Mazda Part Number is: KD53-50-EJ2B
Some links:
https://www.mazda-parts.com/oem-parts/mazda-tow-hook-kd5350ej2b
https://www.zoomzoomnationparts.com/p/Mazda__/Tow-Hook/55775269/KD5350EJ2B.html
https://www.amazon.com/Mazda-Tow-Hook-OEM-2014-2015/dp/B01MTK1SXB
The EJ2B replaced the EJ1B, I suspect there may have been a problem with the EJ1B.
If you don't want to buy the OEM replacement you can probably glean measurements from the OEM part.