I'm working on an adapter board for 4-in-1 RF module (I recently sent out for the 4th version of the board) and it contains an SPI flash for Deviation filesystem. It's original purpose was to support Radiolink AT9 which has abysmal amount of flash memory but as the module is designed to fit Devo 10 socket (and Devo 8, Devo 12, Devo F4/F7, so I suppose F12e uses the same socket) it can be used there. It will require modification of the code as well, I'm looking into it.
Current state is: hardware basically done, verified on Radiolink AT9. Radiolink and Devo 7E require another adapter board - designed, ordered, but still in the factory. Code works for AT9 only right now, I will propagate it to all other Devos as a next step.
As usual, can't promise anything about timeframe - depends heavily on my free time.