Unfortunately, it comes across like whining.
Assuming you bought it from CNC4PC, yes, they should carry the cable.
CNC Drive sells them, if you buy direct from Hungary.
I'm not a huge fan of CNC4PC myself, but since they are the main distributor for a lot of products, I still buy a lot from them.
My point is that most people have to buy the cables anyway, so you shouldn't be including the cost of the cables.