I decided that I would paint up the command sprue from the Zvezda Russian Noble Cavalry as either a Cossack or Polish Commander. I had bought the set in a hope of more usable figures for Cossacks/Poles. Regretably there were none really suitable. It's a shame that PSR can't keep up with the pace of recent releases, or my desire to purchase them.
Still it's an excellent group, but the exact appearance is more Russian than either Polish or Cossack, especially with the beards., however I'm sure they will appear in these armies at the appropriate time.
If anyone need extra noble cavalry I'll be putting the figures up on the Trading Department shortly as I try to limit my period creep!