Ladder To Access Roof Cage.

[Almac]

I have fitted a rhino Roof rack/ cage to my lWB T5 with an awning attached. When travelling I plan on storing goods in the cage/roof rack, but as the awning is on the sliding door side, I cant get up to the cage from the other side.. Any help or ideas where to get a ladder that will maybe hook on. Or has anybody actually made one to suit..??
All help/suggestions are much appreciated.
Thanks in advance
Almac.