http://http://bananapi.org/#

and

http://http://www.lemaker.org/

it looks like they point to the same product.

for buying it, there are plenty of vendors:
http://www.alibaba.com/products/F0/banana_pi/----------------------50/3.html

Thanks to Peter Green about his comment about Raspberry Pi's image:
"
You certainly aren't going to run an unmodified raspberry Pi image on
the thing. It's a completely different SoC and will need a different
kernel and bootloader.
"

It's clearly what I thought, but their synthaxes on their websites is deliberately

Erix