Tony
Is this the sort of thing, I am have the bose on a 2003 S and would really like to change to a double din,
http://www.ebay.co.uk/itm/Hosa-ODL-276A-Digital-Audio-Interface-S-PDIF-Coax-to-S-PDIF-Optical-/230975084974?pt=UK_Sound_Vision_Other&hash=item35c73019ae
Cheers Tony G
Your link is for an spdif to coax (or vice versa) converter. That will not help you with MOST and the Bose system I'm afraid.
Cheers mate great post by the way, should be of great help to some of the guys