Help determining required firmware

I hope this is the right forum. I have a generic A13 Chinese tablet but I'm having difficulty tracking down the firmware I need to flash it. There are no markings on the back to indicate manufacturer and the space on the board where the ID is supposed to be found is blank. I took some pictures of the main board, maybe you guys will see an identifying marker that I missed.

http://i.imgur.com/YPRnVDx.jpg

http://i.imgur.com/axRkExe.jpg

http://i.imgur.com/YD7a8za.jpg

http://i.imgur.com/fzrzS7s.jpg