Bunk ladder? 31MB

We are trying to figure out where you get a bunk ladder for the 31MB. We take delivery of our new trailer next week and are trying to get ahead of things we know we will need.

Most dealers have them. Also Amazon, Walmart. Here is the rub. The ladders are not a fit. Smallest I found was 60". There is instructions on how to cut it. Get a file to soften the sharp edge.