I'm not sure if it only comes with switch stalks unit from dealer, if so about £200 (give or take £50) at a guess.
You might get used, but it needs to come from a Panda with the same steering controls and you need to be certain the clock spring has been secured 'centrally' when removed so that it isn't out by even a turn when refitted. Wen new they have a plastic securing tab which has to be pulled off once fitted. Unfortunately the clock spring I have isn't for steering controls