Im looking for a mod that only adds a few extra bars, im not looking for Bongos or Trinity, those change the default UI which i do not wish to do, i just want some extra bars that i can hide and show when im doing arena or raiding or whatever. anyone know of one?

I don't think there are any mods that do what you're looking for. however blizzard has extra bars under the interface options menu that might work out better. otherwise you might just have to break down and get bongos/trinity/bartender or whatever

... yeah i have all bars shown but there full and i need more

so why not download TrinityBars2?

the DEFAULT layout of it mimics the default blizzard UI, with the bars along the bottom and right side of your screen....from there you can customize and add/remove bars however you see fit.

these don't "change the default UI" any more than what you're looking for would.