Android box with SPDIF output (optical /coax)

Hello

I'm looking for and android box with XBMC pre-installed (or installable).
I see many different boxes, but it seems difficult to get one with and SPDIF output.

Reason is I use a video projector (HDMI input) and regarding the sound I have digital inputs (coax and optical) but no HDMI input in my sound system.

I was going for a pivos because amongst other reasons they sponsor XBMC, but it seems to only offer 1 HDMI out.

Anyone knows a box that could meet my requirements?

Thanks