L322 roof bars and getting stuff up there

Hi Guys, has anyone had any recent luck sourcing a rear tailgate/roof ladder for an L322, or found a decent bolt on ladder roller compatible with genuine LR/RR roof bars. Fed up with making an ar$e of myself trying to get stuff up or off the roof. Many hours trawled online without success, but might have been distracted by other shiny stuff in the meantime.

Thanks in advance