Right, don't know the bird, haven't a clue about the platforms but this popped into my head.
Is it possible to fix some form of ladder/steps footing to the platform? So essentially nothing in the way when landing / taking off but come inspection time just slot a ladder or steps into the footing.
Not quite sure what that would look like, two aluminium box sections perhaps that the legs of a ladder could slot straight into. Maybe adjustable to allow for varying position of heli on platform.
Just a thought, no idea if it's practical, legal, sensible, possible or within H&S regs........