Was looking in a catologue of conrad(europaean electronics postorder) but all what I could find where straight ones like in A4000T and it didnt say 72 pin so it could be 30 pins like the one you found.
Thought I saw thode connectors by them but maybe I am mistaking.
Maybe at Farnell?
Try looking for simm module holders or simm fittings.
Or under simm.
I was also thinking of replacing the simm holders of an old A4000 so if you find good quality please let me know!