You didn’t specify price.
If you don’t want that particular brand then look for the type I mentioned afterwards.
Over the years they’ve become harder to find. I’m guessing it’s because most people don’t want that degree of firmness. Or else it many be due to the latex foam being kind of sweaty in warmer weather.
But that can be overcome by getting a quality quilted pillow cover. But they also cost.
I honestly don’t think you are going to find one of sufficient quality if $20 is your upper limit.
Any decent ones which won’t collapse easily are in the $30–40 range (sometimes available on sale for $25–30)
Because I’m a side sleeper, I’ve spent my whole life in search of a pillow firm enough not to collapse midway through the night.
If I’m ever sleeping in a motel or at a friends house, I always bring my own pillow with me cuz I just can’t get a decent sleep on the flimsy ones typically found everywhere.