OK......In reading about BT phone retrofit -
http://forum.a8parts.co.uk/showthread.php?t=908&page=6
There was mention of removing the door trim/kickplate on the passengers side, pull the carpet from the footwell, and BINGO telephone unit is reasonably easy and quick to get to, so i removed it!
Obviously now a break in the MOST loop, so i grabbed the CD player and installed in the glove compartment MOST and then used my GROM at the Telephone MOST.
I tried a quick code and well, still not working, but I'm leaving the car for a bit and see what it finds and so forth!
I may actually grab a BT module as that would be quite useful!
Seems 4E0910336C is £47 delivered on ebay, with antenna and then just needs a new connector, which is irkingly about a tenner!
4F1862335 is £90 but does have the connector, antenna and a bit of MOST, what a crap way to salvage!