Shipping to Poland

I live in Mexico and I have relatives who live in Poland. I want to ship some items to them so they will arrive in time for the holidays, so I am requesting information on shipping to Poland. I expect to have 4 boxes to ship, and one of them may require more attention than the rest. It will contain a stereo system that I found a good deal on that I want to give to my brother for Christmas. How can I pack this stereo so it will not be damaged during shipping? Does your company sell the padding and the boxes that are necessary for me to ship this? The remaining items are not fragile, but I would still like to box them so they will arrive in one piece as well. If your company is knowledgeable about international shipping, please email me with answers to my questions. Also, please include a rough estimate on how much this will cost to ship.