In Sockmasters romhacks Donkey Kong Remix, Christmas Remix and Spooky Remix you actually have to go to Paulines girder to finish the Pie factory board. It is possible to approach the ladder from both sides: from the right side as well as from the left side.
I don't know if he had to make any changes to make the left side approach possible: he might have changed the position of Paulines girder/ladder or made DK change direction more to the right.
One change that he did made is that the fireballs are not stuck on DK's conveyor belt, but are allowed to go down the retractable ladders.
In my romhack Donkey Kong Reverse you start at Paulines girder and have to make your way down to the lowest girder. So jumpman has to pass the DK conveyor belt here also. One detail that I remember when programming it, was that jumpman is also able to climb the two DK ladders (that DK uses to leave the screen after completing it). Normally the check for finishing a level is a simple check on the Y-coordinate of jumpman, so SockMaster must have coded something to prevent finishing the level by climbing up either of the DK ladders.