HTS 10

Hi. I have Polk audio signature bookshelf speakers that were imported from USA to Israel. They are brown. Now I am looking to buy HTS 10 or 12 polkaudio subwoofer and it supposed to be also brown. The problem is that there is no possibility to buy brown color in Israel or in Europe. There are black and white. So my only option is to bay from USA. Problem is that it is powered by 110V. Can I maybe replace internal pover supply to 230V? Or just using external transformer? Thanks