Let’s use 1/4″ SS rod. OK, we need a stainless clevis,
well we have some round bar and an angle grinder.
It’s too flexi let’s try a gusset and blend in all nice.
Ok.
It’s still too flexi

Get the thick stuff out.
**
Now it looks stupid AND still has a lot of flex.
**
One more idea to try before it’s sticking out of the sheetrock on the south side wall.