I got 1305 set from [Cobi][1]. I am missing 3 or more pieces. I can't complete the model without these pieces: 

 - 2 normal black 1 cm high, 6 dots long, rectangular (not round edge)
 - 1 black rectangular flat 3 dots long, 2 dots wide. 

How do I order only these parts? 


  [1]: https://cobi.eu