I would be willing to bet that a Bliss-Box USB converter would be best, infact, another moderator here is the founder of bliss-box. Here is the official website: http://bliss-box.net/Bliss-Box/
If you have any questions, private message Ulaoulao with the link below.
http://forums.emulator-zone.com/member.php?u=4481


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Oh and I have a knack for electronics. You can get this adapter in a number of ways including $0. That just depends on what you are willing to put in it. 
