they are impossible to find.
the only place i remember that even had it was geeks. I have one that I bought used on fs/ft here. The guy who had it probably got it on geeks.
Its probably cheaper to just buy the zotac 9300 board at this point (Though it has a few features that dont work, like no usb wake up etc), but it is more flexible since it has a full x16 slot not a x4 one , and normal ram slots. The j&w has a few more ports on the back though (but again impossible to find). You can import them from europe I think but its just super expensive that way.
Your only other real alternative is no x16 slot with the jetway 780g boards (they have 2 different ones, one with sodimms and one with a single desktop dimm single channel)
The j&w board is also the albatron KI780G but that also isnt in stock anywhere (same board just different color cables and pcb)
some hong kong stores sell it on ebay.
http://*****.com/J-W-MINIX-780G-SP1...QQptZLHQ5fDefaultDomainQ5f0QQsalenotsupported
I am not sure its worth paying $182 for, but if you have to have it... thats how much it costs.