Plus Model, maker of fine detailed aftermarket products, just produced a ladder for the Russian SU-27 Flanker. What is unique about this item is that it is injection molded instead of resin or photo etch that other companies make. Although this does require some assembly, being able to make fine adjustments to better fit the various kits is a real bonus.
The kit comes in a sturdy box and the sprue is in a suitable plastic bag. The instructions are printed on the back of the box and are basic but sufficient to assist your build. The 15 parts have minimal flash which cleans up easily. There are eight steps with a small recess which are likely through holes on the real step. Note that the pattern is not symmetric and the instructions do not indicate what direction they go. Just note that so you can align them in the same direction.