How to identify make/model of a wardrobe?
Ikea usually has very distinctive structure, and usually "Ikea" stamped somewhere.  I don't have much experience with Jysk or Mio, but as far as I remember their furniture is more of the generic type. 

BUT even for Ikea this is not that simple, they don't sell single shelves and their systems tend to slightly change over time.

Hangers are simple enough, you could probably find something generic in Krauta or bauhaus. Shelves are a little more challenging but you can always use generic shelf brackets and cut a piece of wood in with same color and thickness.