Kinda not sure what you are looking for.
Do you want running boards, nerf bars or step bars?
A running board looks like a body extension, sucked up right against the body, like so:
Nerf bars stick out a bit, like a hoop, like so:
Step bars look a bit like nerf bars but have a separate step attached to the main bar, like so:
There are a lot of good choices available of the last two. And, of course, the automatic units such as the AMP Research products, give you that extra feature of dropping down when you open a door but then suck up under the rocker panel when you close the door.
So what style you looking for?