Good news for you! The OV13850 camera and serial board for Firefly-RK3288 are available on Aliexpressnow.
OV13850 color image sensor is a low voltage, high performance 1/3.06-inch 13.2 megapixel CMOS image sensor that provides the functionality of a single 13.2 megapixel (4224×3136) camera using OmniBSI+™ technology.
The serial board is used for debugging of Firefly-RK3288. Which is a bridge between the Firefly and your computer. You can receive the debug information through this board while connect to debug serial on Firefly-RK3288.
OV13850: http://www.aliexpress.com/item/Firefly- ... 01526.html 
Serial board: http://www.aliexpress.com/item/Firefly- ... 76191.html 
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