*Gamestop. com, search "Tablet Wireless Bluetooth Controller"
Went to my local GS and picked it up for $40. It worked perfectly for my Evo 3D and my Galaxy Tab 10.1! Emulator mapping was perfect, already set up for Shadowgun and Sonic CD and a few others. This and an MHL adaptor just made me a happy Evo 3D owner. Hope this helps anyone who was stumped like I was but didn't want to root.