I assume you're talking about switch contact bounce?
You won't be able to find a mechanical switch without it!

Just feeding it through an inverter won't help - you'll just get the same bounce, but inverted!

You need to use a schmitt trigger with an RC to "smooth" out the bouncing.

Or, You can get debounce chips from the likes of Maxim.

Or, use a changeover switch with an S-R latch

OR, do it in software: trigger when the state changes, then keep resampling til it settles.