Great question! I have a solution for you. Since Lippert doesn't have a 4 step and their 3 step is a little to short, I recommend going with the MORryde. It has four steps, will fit all of your RV doorway dimensions and height requirements.
**MORryde StepAbove RV Steps for 27-3/4" to 30-1/4" Wide Doorways - 4 Steps # MR28RR.
*SolidStep Manual Fold-Down Steps for 29" to 36" Wide RV Door Frames - Triple - Aluminum # LC791573.
We do not have a Lippert Solid Step that has 4 steps. However,... view full answer...