1800SAMSUNG to see if they sell such. However http://www.amazon.com/TP-LINK-TL-WA890EA-Universal-Entertainment-Wireless/dp/B00CZ3Z5HI/ is the usual dual band 5GHz WiFi client.
I am looking for a new DVD player. My roommate that has left had a Sony Blue Ray DVD which supported both 2.4 and 5.0ghz which was great for our home network.
I am completely frustrated talking to "professionals" at the big box stores who do not understand what I am asking and the manufacturers no longer state which network frequency they support on the box or on their website. I assume they only support 2.4 as a cost cutting move.