You can now get 3702 from japan site, and also on the U.S. site
Code:
http://dlcdnet.asus.com/pub/ASUS/mb/socketAM3/M4A79_Deluxe/M4A79-ASUS-Deluxe-3702.zip
M4A79 Deluxe 3702 BIOS
Support new CPUs. Please refer to our website at: http://support.asus.com/cpusupport/cpusupport.aspx