well the drawing the parts guy had on the screen with part number 1809.16 referred to a part only shown once at the top mounting, it looks identical to what i've seen on my car (compare the pictures in the first post of this thread to the drawings on page three of this thread), he also pointed out the bottom bracket (which looked totally different to what i have, even though i quoted my car's registration number) with the bush half obscured by the housing didn't have a sepearate number so was obviously a one piece including the housing (£87

)...
i promptly explained what my 'friends in the know' told me and ordered the 1809.16 part, end of story for me at the moment, i will report back on the weekend
reason i went to citroen and not gsf is, gsf don't know what they are talking about obviously, and eurocar parts haven't replied to my emails for 2 day, so i didn't mind paying that little bit extra (minus p&p) to get it from main dealer