Yes on the W204 if you buy new the whole switch pack (with the indicator stalk, cruise control lever, contact spiral, and the steering column cowl) come as one piece. All you really need is the cruise lever and the cowl.
The individual parts can be bought, the only issue you get is if the car it came from was crashed and the airbag went off the contact spiral is often burned out, but then you use the contact spiral from your existing pack.
Search4CarParts will help you look for the parts on eBay
Cheers
Richard