Ah, yes that makes sense. So, I am guessing you need both width and height in case the elephants come close to the camera.
I have not personally used any wide angle camera traps. I do see there are some available online (e.g. a quick Amazon search for "wide angle trail camera"), but I don't recognize any of those companies / brands. Several are listed for approximately $50 USD but their demos and product descriptions leave me worried they might not be reliable in your demanding environment (moisture, animal interaction, battery life, etc.).
Hopefully someone else here has more experience with wide-angle units and can be more helpful.