I don't want to do that if there is single cavity sliding door which can span the full 2.8 meters. That's the critical question here.
I'm hoping that somebody may have done this before, in this forum. I would have thought that large spans aren't overly unusual. Large spans have their benefits.
Have tried to get one costum made from doors golore its no harm asking them since they do make all kind of doors. Hope that helps you or the Doors Galore to advise you if they don't its your best bet.
Regards and good luck.