Best place to buy cables is monoprice.com. I have purchased Cat5, HDMI, DVI, USB and other cables from them and have always been pleased with the quality and price. These are VERY inexpensive and work just fine. Check out this link ans save some $$.
Three years and I thought the monitor USB ports didn’t work & would not mess with it until I saw this and stole my printer cable … now it works; I did not see this cable in the setup guide … if all fails read the directions … I am a MAN!