No sir, no pics of that exact rod end being used as a trailer hitch. I have seen their large heims and IIRC, Poly Performance makes one even a bit larger, used on monster hill-killing, rock bouncer style buggies and they hold up fine. So, the strength is not an issue, for certain.
If I were going to use it for a small trailer, I would make it serviceable, i.e. thread the large heim into a round tube that bolts into a square tube. This allows the "tongue" to be replaced if it is damaged and allows the heim to be removed for service, as it is completely rebuildable.
Mounted 90* from normal with the bolt going in vertically, you have 90* of swing, or until your trailer tongue hits your truck. You also have 28* or 32* of misalignment in the vertical direction, allowing your truck and trailer to easily climb and descend without binding.
Many Aussie trailer manufacturers, use one or more of these:
OZ Hitch, AL-KO and ARK-XO are all good off road hitches, made in Australia. While a Lock 'n Roll type hitch is more popular in the US, I would prefer the security and robustness of the purpose made off road hitches. Patriot's DO-35 is another option, from Oz.
It all comes down to budget, how much you need a trailer coupling to flex and how security conscious you want to be.
And finally, just because you asked nicely, here is a pic of a another monster rod end being used on an offroad trailer: