No such thing, unless you mean a folk dancing costume and there are plenty of those differing in colour from region to region.. None of them genuinely like the day to day wear of the time and place they're meant to represent though. Too stylised and frankly too colourful and clean. The nearest is maybe góralski clothing - a few (but only a very tiny few) wear that if they aren't performing something. That resembles Swiss Alpine folk dress a little.
Why not Google Polish folk costume and see if you can find something similar at a theatrical costume hire place. Most would have something that would pass for it, especially if they hire for opera.
